MVC web application framework

https://rubyonrails.org/ https://github.com/rails/rails

Rails internals bootup, plugins, generators, and rake tasks

https://rubyonrails.org/ https://github.com/rails/rails/tree/main/railties

Ruby Make

https://ruby.github.io/rake/ https://github.com/ruby/rake

Pure ruby ASN.1 library

https://codeberg.org/lemontree55/rasn1

FSEvents API with Signals catching (without RubyCocoa)

https://github.com/guard/rb-fsevent

Library to create/read/write to XBase databases (*.DBF files)

https://rubygems.org/gems/rbase

Ruby interface to the VMware vSphere API

https://github.com/vmware/rbvmomi

Ruby interface to the VMware vSphere API

https://github.com/ManageIQ/rbvmomi2

Fast Markdown converter for ruby based on discount

https://dafoster.net/projects/rdiscount/

RDoc produces HTML and command-line documentation for Ruby projects

https://ruby.github.io/rdoc/

RD to HTML/man/etc. converter (RD is to Ruby as POD is to Perl)

https://github.com/uwabami/rdtool

Provide a wide array of features for dealing with colors

https://github.com/red-data-tools/red-colors

Ruby client library for Redis, the key value storage server

https://github.com/redis/redis-rb

Redis session store for ActionPack

https://redis-store.org/redis-actionpack/

Redis session store for ActionPack

https://redis-store.org/redis-actionpack/

Simple low-level client for Redis 6+

https://github.com/redis-rb/redis-client

Redis cluster client for Ruby

https://github.com/redis-rb/redis-cluster-client

Ruby client that tries to match Redis Cluster API

https://github.com/redis/redis-rb/tree/master/cluster

Ruby client class for Redis with namespace support

https://github.com/resque/redis-namespace

Ruby client class for Redis with namespace support

https://github.com/resque/redis-namespace

Redis Store for Rack

https://redis-store.org/redis-rack/ https://github.com/redis-store/redis-rack

Redis Store for Rack

https://redis-store.org/redis-rack/ https://github.com/redis-store/redis-rack

Namespaced Redis stores for Ruby web frameworks

https://redis-store.org/redis-store/ https://github.com/redis-store/redis-store

Alternative GNU Readline or Editline implementation by pure Ruby

https://github.com/ruby/reline

Maps Ruby objects to documents and back

https://github.com/trailblazer/representable

Simple Simple HTTP and REST client for Ruby

https://github.com/rest-client/rest-client

Simple Simple HTTP and REST client for Ruby

https://github.com/rest-client/rest-client

Simple DSL to retry failed code blocks

https://github.com/kamui/retriable

Allow for retrying of code blocks

https://github.com/nfedyashev/retryable

XML toolkit for Ruby

https://github.com/ruby/rexml

Provides access to Amazon EC2, S3, SQS, and SDB web services

https://github.com/rightscale/right_aws

Provides Ruby access to the Flexiscale API

https://github.com/rightscale/right_flexiscale

Provides Ruby access to the GoGrid API

https://github.com/rightscale/right_gogrid

Persistent HTTP/HTTPS connections with error retries

https://github.com/rightscale/right_http_connection

Builds manuals

https://rtomayko.github.io/ronn/

Simple, easy-to-extend drop-in replacement for pygments

https://github.com/jneen/rouge

Simple, easy-to-extend drop-in replacement for pygments

https://github.com/jneen/rouge

Simple, easy-to-extend drop-in replacement for pygments

https://github.com/jneen/rouge

Behaviour Driven Development in Ruby

https://rspec.info/ https://github.com/rspec/rspec/tree/main/rspec https://github.com/rspec/rspec

RSpec Core provides the structure for writing executable examples

https://rspec.info/ https://github.com/rspec/rspec/tree/main/rspec-core https://github.com/rspec/rspec

Rspec-expectations adds should and should_not to every object

https://rspec.info/ https://github.com/rspec/rspec/tree/main/rspec-expectations https://github.com/rspec/rspec

Rspec-mocks provides a test-double framework for rspec

https://rspec.info/ https://github.com/rspec/rspec/tree/main/rspec-mocks https://github.com/rspec/rspec

Support utilities for RSpec gems

https://rspec.info/ https://github.com/rspec/rspec/tree/main/rspec-support https://github.com/rspec/rspec

Ruby rsync library

https://github.com/jbussdieker/ruby-rsync

RT into HTML and plain text converter

https://rubygems.org/gems/rttool

Ruby Interface to the GraphViz Graphing Tool

https://github.com/glejeune/Ruby-Graphviz

Pure-ruby growl notifier

https://github.com/drbrain/ruby-growl

MySQL connector in pure ruby

https://gitlab.com/tmtms/ruby-mysql

OpenID library written in pure Ruby

https://github.com/openid/ruby-openid

Pure Ruby implementation of the RC4 algorithm

https://github.com/caiges/Ruby-RC4