actionmailer                     Email composition, delivery, and receiving framework (part of Rails).
                                 |__ https://rubygems.org/gems/actionmailer
actionpack                       Web-flow and rendering framework putting the VC in MVC (part of Rails).
                                 |__ https://rubygems.org/gems/actionpack
actionview                       Rendering framework putting the V in MVC (part of Rails).
                                 |__ https://rubygems.org/gems/actionview
activejob                        Job framework with pluggable queues.
                                 |__ https://rubygems.org/gems/activejob
activemodel                      A toolkit for building modeling frameworks (part of Rails).
                                 |__ https://rubygems.org/gems/activemodel
activerecord                     Object-relational mapper framework (part of Rails).
                                 |__ https://rubygems.org/gems/activerecord
activesupport                    A toolkit of support libraries and Ruby core
                                 |   extensions extracted from the Rails framework.
                                 |__ https://rubygems.org/gems/activesupport
addressable                      URI Implementation
                                 |__ https://rubygems.org/gems/addressable
airbrussh                        Airbrussh pretties up your SSHKit and Capistrano output
                                 |__ https://rubygems.org/gems/airbrussh
annotate                         Annotates Rails Models, routes, fixtures,
                                 |   and others based on the database schema.
                                 |__ https://rubygems.org/gems/annotate
arel                             Arel Really Exasperates Logicians Arel is a SQL AST manager for Ruby
                                 |__ https://rubygems.org/gems/arel
ast                              A library for working with Abstract Syntax Trees.
                                 |__ https://rubygems.org/gems/ast
auto_strip_attributes            Removes unnecessary whitespaces in attributes.
                                 |   Extension to ActiveRecord or ActiveModel.
                                 |__ https://rubygems.org/gems/auto_strip_attributes
awesome_print                    Pretty print Ruby objects with proper indentation and colors
                                 |__ https://rubygems.org/gems/awesome_print
axiom-types                      Abstract types for logic programming
                                 |__ https://rubygems.org/gems/axiom-types
bcrypt                           OpenBSD's bcrypt() password hashing algorithm.
                                 |__ https://rubygems.org/gems/bcrypt
better_errors                    Better error page for Rails and other Rack apps
                                 |__ https://rubygems.org/gems/better_errors
bigdecimal                       Arbitrary-precision decimal floating-point number library.
                                 |__ https://rubygems.org/gems/bigdecimal
binding.repl                     "binding.pry" for every ruby repl
                                 |__ https://rubygems.org/gems/binding.repl
binding_of_caller                Retrieve the binding of a method's caller. Can
                                 |   also retrieve bindings even further up the stack.
                                 |__ https://rubygems.org/gems/binding_of_caller
bond                             Mission: Easy custom autocompletion for arguments, methods and beyond.
                                 |   Accomplished for irb and any other readline-like console environments.
                                 |__ https://rubygems.org/gems/bond
brakeman                         Security vulnerability scanner for Ruby on Rails.
                                 |__ https://rubygems.org/gems/brakeman
builder                          Builders for MarkUp.
                                 |__ https://rubygems.org/gems/builder
bundler                          The best way to manage your application's dependencies
                                 |__ https://rubygems.org/gems/bundler
bundler-unload                   Allow unloading bundler after Bundler.load
                                 |__ https://rubygems.org/gems/bundler-unload
byebug                           Ruby 2.0 fast debugger - base + CLI
                                 |__ https://rubygems.org/gems/byebug
cancancan                        Simple authorization solution for Rails.
                                 |__ https://rubygems.org/gems/cancancan
capistrano                       Capistrano - Welcome to easy deployment with Ruby over SSH
                                 |__ https://rubygems.org/gems/capistrano
capistrano-bundler               Bundler support for Capistrano 3.x
                                 |__ https://rubygems.org/gems/capistrano-bundler
capistrano-delayed-job           Capistrano tasks for automatic and sensible DelayedJob configuration.
                                 |__ https://rubygems.org/gems/capistrano-delayed-job
capistrano-faster-assets         Speeds up asset compilation if none of the
                                 |   assets were changed since last release.
                                 |__ https://rubygems.org/gems/capistrano-faster-assets
capistrano-harrow                A plugin to improve the user experience for users of Capistrano and Harrow
                                 |__ https://rubygems.org/gems/capistrano-harrow
capistrano-postgresql            Creates application database user and `database.yml`
                                 |   on the server. No SSH login required!
                                 |__ https://rubygems.org/gems/capistrano-postgresql
capistrano-rails                 Rails specific Capistrano tasks
                                 |__ https://rubygems.org/gems/capistrano-rails
capistrano-safe-deploy-to        Capistrano plugin that ensures the `deploy_to`
                                 |   deployment path exists and has the right permissions.
                                 |__ https://rubygems.org/gems/capistrano-safe-deploy-to
capistrano-secrets-yml           Capistrano tasks for automating `secrets.yml`
                                 |   file handling for Rails 4+ apps.
                                 |__ https://rubygems.org/gems/capistrano-secrets-yml
capistrano-ssh-doctor            This plugin helps you setup and debug `ssh-doctor`
                                 |   forwarding for Capistrano deployment.
                                 |__ https://rubygems.org/gems/capistrano-ssh-doctor
capistrano3-puma                 Puma integration for Capistrano
                                 |__ https://rubygems.org/gems/capistrano3-puma
capybara                         Capybara aims to simplify the process of integration
                                 |   testing Rack applications, such as Rails, Sinatra or Merb
                                 |__ https://rubygems.org/gems/capybara
carrierwave                      Ruby file upload library
                                 |__ https://rubygems.org/gems/carrierwave
cd                               Enhanced cd command for the Ruby console
                                 |__ https://rubygems.org/gems/cd
chunky_png                       Pure ruby library for read/write, chunk-level access to PNG files
                                 |__ https://rubygems.org/gems/chunky_png
clipboard                        Access to the clipboard on Linux, MacOS, Windows, and Cygwin.
                                 |__ https://rubygems.org/gems/clipboard
code                             Displays a method's code.
                                 |__ https://rubygems.org/gems/code
code_analyzer                    a code analyzer helps you build your own code analyzer tool.
                                 |__ https://rubygems.org/gems/code_analyzer
codeclimate-engine-rb            JSON issue formatter for the Code Climate engine
                                 |__ https://rubygems.org/gems/codeclimate-engine-rb
coderay                          Fast syntax highlighting for selected languages.
                                 |__ https://rubygems.org/gems/coderay
coercible                        Powerful, flexible and configurable coercion library. And nothing more.
                                 |__ https://rubygems.org/gems/coercible
compass                          A Real Stylesheet Framework
                                 |__ https://rubygems.org/gems/compass
concurrent-ruby                  Modern concurrency tools for Ruby. Inspired by Erlang, Clojure,
                                 |   Scala, Haskell, F#, C#, Java, and classic concurrency patterns.
                                 |__ https://rubygems.org/gems/concurrent-ruby
connect_vbms                     Connect to VBMS with ease
                                 |__ https://rubygems.org/gems/connect_vbms
connection_pool                  Generic connection pool for Ruby
                                 |__ https://rubygems.org/gems/connection_pool
crack                            Really simple JSON and XML parsing, ripped from Merb and Rails.
                                 |__ https://rubygems.org/gems/crack
daemons                          A toolkit to create and control daemons in different ways
                                 |__ https://rubygems.org/gems/daemons
database_cleaner                 Strategies for cleaning databases. Can be
                                 |   used to ensure a clean state for testing.
                                 |__ https://rubygems.org/gems/database_cleaner
debug_inspector                  A Ruby wrapper for the MRI 2.0 debug_inspector API
                                 |__ https://rubygems.org/gems/debug_inspector
debugging                        Print debugging helpers.
                                 |__ https://rubygems.org/gems/debugging
delayed_job                      Database-backed asynchronous priority
                                 |   queue system -- Extracted from Shopify
                                 |__ https://rubygems.org/gems/delayed_job
delayed_job_active_record        ActiveRecord backend for DelayedJob
                                 |__ https://rubygems.org/gems/delayed_job_active_record
descendants_tracker              Module that adds descendant tracking to a class
                                 |__ https://rubygems.org/gems/descendants_tracker
devise                           Flexible authentication solution for Rails with Warden
                                 |__ https://rubygems.org/gems/devise
did_you_mean                     "Did you mean?" experience in Ruby
                                 |__ https://rubygems.org/gems/did_you_mean
diff-lcs                         Diff::LCS computes the difference between two Enumerable sequences
                                 |   using the McIlroy-Hunt longest common subsequence (LCS) algorithm
                                 |__ https://rubygems.org/gems/diff-lcs
docile                           Docile keeps your Ruby DSLs tame and well-behaved
                                 |__ https://rubygems.org/gems/docile
dotenv                           Loads environment variables from `.env`.
                                 |__ https://rubygems.org/gems/dotenv
dotenv-rails                     Autoload dotenv in Rails.
                                 |__ https://rubygems.org/gems/dotenv-rails
equalizer                        Module to define equality, equivalence and inspection methods
                                 |__ https://rubygems.org/gems/equalizer
erubis                           a fast and extensible eRuby implementation which supports multi-language
                                 |__ https://rubygems.org/gems/erubis
ethon                            Libcurl wrapper.
                                 |__ https://rubygems.org/gems/ethon
every_day_irb                    EveryDayIrb simplifies daily life in IRB.
                                 |__ https://rubygems.org/gems/every_day_irb
execjs                           Run JavaScript code from Ruby
                                 |__ https://rubygems.org/gems/execjs
executable-hooks                 Hook into rubygems executables allowing extra
                                 |   actions to be taken before executable is run.
                                 |__ https://rubygems.org/gems/executable-hooks
factory_girl                     factory_girl provides a framework and DSL for
                                 |   defining and using model instance factories.
                                 |__ https://rubygems.org/gems/factory_girl
factory_girl_rails               factory_girl_rails provides integration
                                 |   between factory_girl and rails 3 or newer
                                 |__ https://rubygems.org/gems/factory_girl_rails
fancy_irb                        FancyIrb makes IRB friendly.
                                 |__ https://rubygems.org/gems/fancy_irb
ffaker                           Ffaker generates dummy data.
                                 |__ https://rubygems.org/gems/ffaker
ffi                              Ruby FFI
                                 |__ https://rubygems.org/gems/ffi
flay                             Flay analyzes code for structural similarities
                                 |__ https://rubygems.org/gems/flay
flog                             Flog reports the most tortured code in an easy to read pain report
                                 |__ https://rubygems.org/gems/flog
fml_forms                        Read FML and create forms
                                 |__ https://rubygems.org/gems/fml_forms
formatador                       Ruby STDOUT text formatting
                                 |__ https://rubygems.org/gems/formatador
foundation-rails                 ZURB Foundation on Sass/Compass
                                 |__ https://rubygems.org/gems/foundation-rails
fssm                             File System State Monitor
                                 |__ https://rubygems.org/gems/fssm
gem-wrappers                     Create gem wrappers for easy use of gems
                                 |   in cron and other system locations.
                                 |__ https://rubygems.org/gems/gem-wrappers
globalid                         Refer to any model with a URI: gid://app/class/id
                                 |__ https://rubygems.org/gems/globalid
guard                            Guard keeps an eye on your file modifications
                                 |__ https://rubygems.org/gems/guard
guard-brakeman                   Guard gem for Brakeman
                                 |__ https://rubygems.org/gems/guard-brakeman
guard-compat                     Tools for developing Guard compatible plugins
                                 |__ https://rubygems.org/gems/guard-compat
guard-puma                       Restart puma when files change
                                 |__ https://rubygems.org/gems/guard-puma
guard-rspec                      Guard gem for RSpec
                                 |__ https://rubygems.org/gems/guard-rspec
guard-rubocop                    Guard plugin for RuboCop
                                 |__ https://rubygems.org/gems/guard-rubocop
guard-rubycritic                 Listens to modifications and detects smells in Ruby files
                                 |__ https://rubygems.org/gems/guard-rubycritic
haml                             An elegant, structured (X)HTML/XML templating engine.
                                 |__ https://rubygems.org/gems/haml
haml-rails                       let your Gemfile do the configuring
                                 |__ https://rubygems.org/gems/haml-rails
hashdiff                         HashDiff is a diff lib to compute the
                                 |   smallest difference between two hashes.
                                 |__ https://rubygems.org/gems/hashdiff
hashie                           Your friendly neighborhood hash library.
                                 |__ https://rubygems.org/gems/hashie
hike                             Find files in a set of paths
                                 |__ https://rubygems.org/gems/hike
hipchat                          Ruby library to interact with HipChat
                                 |__ https://rubygems.org/gems/hipchat
hirb                             A mini view framework for console/irb that's
                                 |   easy to use, even while under its influence.
                                 |__ https://rubygems.org/gems/hirb
httparty                         Makes http fun! Also, makes consuming restful web services dead easy.
                                 |__ https://rubygems.org/gems/httparty
httpi                            Common interface for Ruby's HTTP libraries
                                 |__ https://rubygems.org/gems/httpi
i18n                             New wave Internationalization support for Ruby
                                 |__ https://rubygems.org/gems/i18n
ice_nine                         Deep Freeze Ruby Objects
                                 |__ https://rubygems.org/gems/ice_nine
instance                         Object Instance API
                                 |__ https://rubygems.org/gems/instance
interactive_editor               Interactive editing in irb.
                                 |__ https://rubygems.org/gems/interactive_editor
io-console                       Console interface
                                 |__ https://rubygems.org/gems/io-console
irbtools                         Irbtools happy IRB.
                                 |__ https://rubygems.org/gems/irbtools
irbtools-more                    irbtools-more adds bond and looksee to IRB.
                                 |__ https://rubygems.org/gems/irbtools-more
jbuilder                         Create JSON structures via a Builder-style DSL
                                 |__ https://rubygems.org/gems/jbuilder
jquery-datatables-rails          jquery datatables for rails
                                 |__ https://rubygems.org/gems/jquery-datatables-rails
jquery-inputmask-rails           Integrate the jQuery InputMask plugin into the Rails asset pipeline
                                 |__ https://rubygems.org/gems/jquery-inputmask-rails
jquery-rails                     Use jQuery with Rails 4+
                                 |__ https://rubygems.org/gems/jquery-rails
jquery-timepicker-addon-rails    Use jquery-ui-timepicker-addon with Rails 3/4
                                 |__ https://rubygems.org/gems/jquery-timepicker-addon-rails
jquery-ui-rails                  jQuery UI packaged for the Rails asset pipeline
                                 |__ https://rubygems.org/gems/jquery-ui-rails
json                             This json is bundled with Ruby
                                 |__ https://rubygems.org/gems/json
launchy                          Launchy is helper class for launching cross-platform
                                 |   applications in a fire and forget manner.
                                 |__ https://rubygems.org/gems/launchy
letter_opener                    Preview mail in browser instead of sending.
                                 |__ https://rubygems.org/gems/letter_opener
libv8                            Distribution of the V8 JavaScript engine
                                 |__ https://rubygems.org/gems/libv8
libxml-ruby                      Ruby Bindings for LibXML2
                                 |__ https://rubygems.org/gems/libxml-ruby
listen                           Listen to file modifications
                                 |__ https://rubygems.org/gems/listen
loofah                           Loofah is a general library for manipulating and
                                 |   transforming HTML/XML documents and fragments
                                 |__ https://rubygems.org/gems/loofah
looksee                          Supercharged method introspection in IRB.
                                 |__ https://rubygems.org/gems/looksee
lumberjack                       A simple, powerful, and very fast logging utility that can be a
                                 |   drop in replacement for Logger or ActiveSupport::BufferedLogger.
                                 |__ https://rubygems.org/gems/lumberjack
mail                             Mail provides a nice Ruby DSL for making, sending and reading emails.
                                 |__ https://rubygems.org/gems/mail
method_locator                   method_locator provides a way to traverse an object's method
                                 |   lookup path to find all places where a method may be defined.
                                 |__ https://rubygems.org/gems/method_locator
method_source                    retrieve the sourcecode for a method
                                 |__ https://rubygems.org/gems/method_source
methodfinder                     A Smalltalk-like Method Finder for Ruby
                                 |__ https://rubygems.org/gems/methodfinder
mime-types                       The mime-types library provides a library and registry
                                 |   for information about MIME content type definitions
                                 |__ https://rubygems.org/gems/mime-types
mime-types-data                  mime-types-data provides a registry for
                                 |   information about MIME media type definitions
                                 |__ https://rubygems.org/gems/mime-types-data
mimemagic                        Fast mime detection by extension or content
                                 |__ https://rubygems.org/gems/mimemagic
mini_magick                      Manipulate images with minimal use of
                                 |   memory via ImageMagick / GraphicsMagick
                                 |__ https://rubygems.org/gems/mini_magick
mini_portile2                    Simplistic port-like solution for developers
                                 |__ https://rubygems.org/gems/mini_portile2
minitest                         minitest provides a complete suite of testing facilities
                                 |   supporting TDD, BDD, mocking, and benchmarking
                                 |__ https://rubygems.org/gems/minitest
multi_json                       A common interface to multiple JSON libraries.
                                 |__ https://rubygems.org/gems/multi_json
multi_xml                        A generic swappable back-end for XML parsing
                                 |__ https://rubygems.org/gems/multi_xml
nenv                             Convenience wrapper for Ruby's ENV
                                 |__ https://rubygems.org/gems/nenv
net-scp                          A pure Ruby implementation of the SCP client protocol
                                 |__ https://rubygems.org/gems/net-scp
net-ssh                          Net::SSH: a pure-Ruby implementation of the SSH2 client protocol.
                                 |__ https://rubygems.org/gems/net-ssh
net-telnet                       Provides telnet client functionality.
                                 |__ https://rubygems.org/gems/net-telnet
nokogiri                         Nokogiri (鋸) is an HTML, XML, SAX, and Reader parser
                                 |__ https://rubygems.org/gems/nokogiri
notiffany                        Notifier library (extracted from Guard project)
                                 |__ https://rubygems.org/gems/notiffany
omniauth                         A generalized Rack framework for multiple-provider authentication.
                                 |__ https://rubygems.org/gems/omniauth
omniauth-saml                    A generic SAML strategy for OmniAuth.
                                 |__ https://rubygems.org/gems/omniauth-saml
ori                              Object-Oriented RI for IRB Console
                                 |__ https://rubygems.org/gems/ori
orm_adapter                      orm_adapter provides a single point of entry for using
                                 |   basic features of popular ruby ORMs. Its target audience
                                 |   is gem authors who want to support many ruby ORMs.
                                 |__ https://rubygems.org/gems/orm_adapter
os                               Simple and easy way to know if you're on windows or not
                                 |   (reliably), as well as how many bits the OS is, etc.
                                 |__ https://rubygems.org/gems/os
paint                            Terminal painter!
                                 |__ https://rubygems.org/gems/paint
parser                           A Ruby parser written in pure Ruby.
                                 |__ https://rubygems.org/gems/parser
passenger                        A fast and robust web server and application
                                 |   server for Ruby, Python and Node.js
                                 |__ https://rubygems.org/gems/passenger
path_expander                    PathExpander helps pre-process command-line arguments
                                 |   expanding directories into their constituent files
                                 |__ https://rubygems.org/gems/path_expander
pg                               Pg is the Ruby interface to the {PostgreSQL
                                 |   RDBMS}[http://www.postgresql.org/]
                                 |__ https://rubygems.org/gems/pg
pointless_feedback               Simple Rails Engine to allow users to submit feedback
                                 |__ https://rubygems.org/gems/pointless_feedback
powerpack                        A few useful extensions to core Ruby classes.
                                 |__ https://rubygems.org/gems/powerpack
pry                              An IRB alternative and runtime developer console
                                 |__ https://rubygems.org/gems/pry
pry-byebug                       Fast debugging with Pry.
                                 |__ https://rubygems.org/gems/pry-byebug
pry-rails                        Use Pry as your rails console
                                 |__ https://rubygems.org/gems/pry-rails
psych                            Psych is a YAML parser and emitter
                                 |__ https://rubygems.org/gems/psych
public_suffix                    Domain name parser based on the Public Suffix List.
                                 |__ https://rubygems.org/gems/public_suffix
puma                             Puma is a simple, fast, threaded, and highly
                                 |   concurrent HTTP 1.1 server for Ruby/Rack applications
                                 |__ https://rubygems.org/gems/puma
quiet_assets                     Turns off Rails asset pipeline log.
                                 |__ https://rubygems.org/gems/quiet_assets
qunit-rails                      QUnit for Rails.
                                 |__ https://rubygems.org/gems/qunit-rails
rack                             a modular Ruby webserver interface
                                 |__ https://rubygems.org/gems/rack
rack-accept                      HTTP Accept* for Ruby/Rack
                                 |__ https://rubygems.org/gems/rack-accept
rack-protection                  You should use protection!
                                 |__ https://rubygems.org/gems/rack-protection
rack-test                        Simple testing API built on Rack
                                 |__ https://rubygems.org/gems/rack-test
rails                            Full-stack web application framework.
                                 |__ https://rubygems.org/gems/rails
rails-assets-datetimepicker
                                 |__ https://rubygems.org/gems/rails-assets-datetimepicker
rails-assets-jquery
                                 |__ https://rubygems.org/gems/rails-assets-jquery
rails-assets-jquery-mousewheel
                                 |__ https://rubygems.org/gems/rails-assets-jquery-mousewheel
rails-assets-php-date-formatter  A Javascript datetime formatting and manipulation
                                 |   library using PHP date-time formats.
                                 |__ https://rubygems.org/gems/rails-assets-php-date-formatter
rails-deprecated_sanitizer       Deprecated sanitizer API extracted from Action View.
                                 |__ https://rubygems.org/gems/rails-deprecated_sanitizer
rails-dom-testing                Dom and Selector assertions for Rails applications
                                 |__ https://rubygems.org/gems/rails-dom-testing
rails-html-sanitizer             This gem is responsible to sanitize HTML fragments in Rails applications.
                                 |__ https://rubygems.org/gems/rails-html-sanitizer
rails_12factor                   Following best practices from http://12factor.net
                                 |   run a maintainable, clean, and scalable app on Rails
                                 |__ https://rubygems.org/gems/rails_12factor
rails_best_practices             a code metric tool for rails codes.
                                 |__ https://rubygems.org/gems/rails_best_practices
rails_serve_static_assets        Sets serve_static_assets to true so Rails will sere your static assets
                                 |__ https://rubygems.org/gems/rails_serve_static_assets
rails_stdout_logging             Overrides Rails' built in logger to send all logs to stdout
                                 |__ https://rubygems.org/gems/rails_stdout_logging
railties                         Tools for creating, working with, and running Rails applications.
                                 |__ https://rubygems.org/gems/railties
rainbow                          Colorize printed text on ANSI terminals
                                 |__ https://rubygems.org/gems/rainbow
rake                             Rake is a Make-like program implemented in Ruby
                                 |__ https://rubygems.org/gems/rake
rb-fsevent                       Very simple & usable FSEvents API
                                 |__ https://rubygems.org/gems/rb-fsevent
rb-inotify                       A Ruby wrapper for Linux's inotify, using FFI
                                 |__ https://rubygems.org/gems/rb-inotify
rdoc                             This rdoc is bundled with Ruby
                                 |__ https://rubygems.org/gems/rdoc
redcarpet                        Markdown that smells nice
                                 |__ https://rubygems.org/gems/redcarpet
redis                            A Ruby client library for Redis
                                 |__ https://rubygems.org/gems/redis
reek                             Code smell detector for Ruby
                                 |__ https://rubygems.org/gems/reek
ref                              Library that implements weak, soft, and strong references in Ruby.
                                 |__ https://rubygems.org/gems/ref
require_all                      A wonderfully simple way to load your code
                                 |__ https://rubygems.org/gems/require_all
responders                       A set of Rails responders to dry up your application
                                 |__ https://rubygems.org/gems/responders
rspec                            rspec-3.0.0
                                 |__ https://rubygems.org/gems/rspec
rspec-core                       rspec-core-3.0.4
                                 |__ https://rubygems.org/gems/rspec-core
rspec-expectations               rspec-expectations-3.0.4
                                 |__ https://rubygems.org/gems/rspec-expectations
rspec-mocks                      rspec-mocks-3.0.4
                                 |__ https://rubygems.org/gems/rspec-mocks
rspec-rails                      rspec-rails-3.0.2
                                 |__ https://rubygems.org/gems/rspec-rails
rspec-support                    rspec-support-3.0.4
                                 |__ https://rubygems.org/gems/rspec-support
rubocop                          Automatic Ruby code style checking tool.
                                 |__ https://rubygems.org/gems/rubocop
ruby-progressbar                 Ruby/ProgressBar is a flexible text progress bar library for Ruby.
                                 |__ https://rubygems.org/gems/ruby-progressbar
ruby-saml                        SAML Ruby Tookit
                                 |__ https://rubygems.org/gems/ruby-saml
ruby_dep                         Extracts supported Ruby versions from Travis file
                                 |__ https://rubygems.org/gems/ruby_dep
ruby_engine                      Adds the RubyEngine pseudo-constant.
                                 |__ https://rubygems.org/gems/ruby_engine
ruby_info                        Adds the RubyInfo pseudo-constant.
                                 |__ https://rubygems.org/gems/ruby_info
ruby_parser                      ruby_parser (RP) is a ruby parser written in pure ruby
                                 |   (utilizing racc--which does by default use a C extension)
                                 |__ https://rubygems.org/gems/ruby_parser
ruby_version                     Adds the RubyVersion pseudo-constant.
                                 |__ https://rubygems.org/gems/ruby_version
rubycritic                       RubyCritic is a Ruby code quality reporter
                                 |__ https://rubygems.org/gems/rubycritic
rubygems-bundler                 Stop using bundle exec
                                 |__ https://rubygems.org/gems/rubygems-bundler
rvm                              RVM Ruby Gem Library
                                 |__ https://rubygems.org/gems/rvm
rvm1-capistrano3                 RVM 1.x / Capistrano 3.x Integration Gem
                                 |__ https://rubygems.org/gems/rvm1-capistrano3
safe_yaml                        SameYAML provides an alternative implementation of YAML.load
                                 |   suitable for accepting user input in Ruby applications.
                                 |__ https://rubygems.org/gems/safe_yaml
sanitize_email                   Email Condom for your Ruby Server
                                 |__ https://rubygems.org/gems/sanitize_email
sass                             A powerful but elegant CSS compiler that makes CSS fun again.
                                 |__ https://rubygems.org/gems/sass
sass-rails                       Sass adapter for the Rails asset pipeline.
                                 |__ https://rubygems.org/gems/sass-rails
sdoc                             rdoc html with javascript search index.
                                 |__ https://rubygems.org/gems/sdoc
seed_dump                        {Seed Dumper for Rails}
                                 |__ https://rubygems.org/gems/seed_dump
sexp_processor                   sexp_processor branches from ParseTree bringing
                                 |   all the generic sexp processing tools with it
                                 |__ https://rubygems.org/gems/sexp_processor
shellany                         Simple, somewhat portable command capturing
                                 |__ https://rubygems.org/gems/shellany
sidekiq                          Simple, efficient background processing for Ruby
                                 |__ https://rubygems.org/gems/sidekiq
simplecov                        Code coverage for Ruby 1.9+ with a powerful configuration
                                 |   library and automatic merging of coverage across test suites
                                 |__ https://rubygems.org/gems/simplecov
simplecov-html                   Default HTML formatter for SimpleCov code coverage tool for ruby 1.9+
                                 |__ https://rubygems.org/gems/simplecov-html
simplecov-json                   JSON formatter for SimpleCov code coverage tool for ruby 1.9+
                                 |__ https://rubygems.org/gems/simplecov-json
simplecov-rcov                   Rcov style formatter for SimpleCov
                                 |__ https://rubygems.org/gems/simplecov-rcov
slop                             Simple Lightweight Option Parsing
                                 |__ https://rubygems.org/gems/slop
socksify                         Redirect all TCPSockets through a SOCKS5 proxy
                                 |__ https://rubygems.org/gems/socksify
spoon                            Spoon is an FFI binding of the posix_spawn function (and Windows
                                 |   equivalent), providing fork+exec functionality in a single shot.
                                 |__ https://rubygems.org/gems/spoon
sprockets                        Rack-based asset packaging system
                                 |__ https://rubygems.org/gems/sprockets
sprockets-rails                  Sprockets Rails integration
                                 |__ https://rubygems.org/gems/sprockets-rails
sshkit                           SSHKit makes it easy to write structured, testable SSH commands in Ruby
                                 |__ https://rubygems.org/gems/sshkit
superlogger                          Machine-readable logging for Rails - Rails' default request logging is
                                     easy to read for humans but difficult for log aggregators such as Kibana,
                                     Graylog and Splunk. . . .
                                 |__ https://rubygems.org/gems/superlogger
terminal-size                    A tiny gem to accomplish a simple task: Determining the terminal size.
                                 |__ https://rubygems.org/gems/terminal-size
test-unit                        An xUnit family unit testing framework for Ruby.
                                 |__ https://rubygems.org/gems/test-unit
test_after_commit                makes after_commit callbacks testable
                                 |   in Rails 3+ with transactional_fixtures
                                 |__ https://rubygems.org/gems/test_after_commit
therubyracer                     Embed the V8 JavaScript interpreter into Ruby
                                 |__ https://rubygems.org/gems/therubyracer
thor                             Thor is a toolkit for building powerful command-line interfaces.
                                 |__ https://rubygems.org/gems/thor
thread_safe                      A collection of data structures and utilities
                                 |   to make thread-safe programming in Ruby easier
                                 |__ https://rubygems.org/gems/thread_safe
tilt                             Generic interface to multiple Ruby template engines
                                 |__ https://rubygems.org/gems/tilt
turnout                          A Rack based maintenance mode plugin for Rails
                                 |__ https://rubygems.org/gems/turnout
typhoeus                         Parallel HTTP library on top of libcurl multi.
                                 |__ https://rubygems.org/gems/typhoeus
tzinfo                           Daylight savings aware timezone library
                                 |__ https://rubygems.org/gems/tzinfo
uglifier                         Ruby wrapper for UglifyJS JavaScript compressor
                                 |__ https://rubygems.org/gems/uglifier
unicode-display_width            Determines the monospace display width of a string in Ruby.
                                 |__ https://rubygems.org/gems/unicode-display_width
virtus                           Attributes on Steroids for Plain Old Ruby Objects
                                 |__ https://rubygems.org/gems/virtus
warden                           Rack middleware that provides authentication for rack applications
                                 |__ https://rubygems.org/gems/warden
webmock                          Library for stubbing HTTP requests in Ruby.
                                 |__ https://rubygems.org/gems/webmock
wicked_pdf                       PDF generator (from HTML) gem for Ruby on Rails
                                 |__ https://rubygems.org/gems/wicked_pdf
wirb                             WIRB Interactive Ruby
                                 |__ https://rubygems.org/gems/wirb
wkhtmltopdf-binary               Provides binaries for WKHTMLTOPDF project in an easily accessible package.
                                 |__ https://rubygems.org/gems/wkhtmltopdf-binary
word_wrapper                     Pure ruby word wrapping
                                 |__ https://rubygems.org/gems/word_wrapper
xmlenc                           A (partial)implementation of the XMLENC specificiation
                                 |__ https://rubygems.org/gems/xmlenc
xmlmapper                        Provides a simple way to map XML to Ruby Objects and back again.
                                 |__ https://rubygems.org/gems/xmlmapper
xpath                            Generate XPath expressions from Ruby
                                 |__ https://rubygems.org/gems/xpath
