This is a list of software and programming tools for the Ruby programming language, which includes libraries, web frameworks, implementations, tools, and related projects.

• Capistrano (software) – remote server automation tool
• Mongrel – Ruby web server
• Rack – interface between web servers and web applications
• Ruby on Rails – full-stack web application framework
• Sinatra – lightweight Ruby web application framework
• Spree Commerce – e-commerce platform
• WEBrick – Ruby HTTP server toolkit

• BioRuby – bioinformatics and computational biology library for Ruby
• Bogus – Ruby library for creating reliable test doubles with contract verification
• ERuby – embedded Ruby templating
• EventMachine – event-driven I/O library
• Factory Bot – test fixtures library
• Fat comma – Ruby library for JSON-like hash syntax
• Geocoder – Ruby library for geocoding and reverse geocoding addresses
• Haml – HTML templating engine
• Markaby – HTML generation via Ruby
• Nokogiri – XML/HTML parsing library
• RSpec – behavior-driven testing framework for Ruby
• RubyGems – package manager for Ruby libraries and applications
• Sass – CSS preprocessor
• Sidekiq – background job framework for Ruby, used to handle asynchronous tasks.
• Uconv – Unicode text conversion library
• Watir – web application testing framework

• HotRuby – Ruby interpreter implemented in JavaScript, enabling Ruby code to run in web browsers.
• IronRuby – Ruby for .NET platform
• JRuby – Ruby on the Java Virtual Machine
• MacRuby – Ruby implementation for macOS
• Mod ruby – Apache module that embeds the Ruby interpreter to improve performance of Ruby web applications
• Mruby – lightweight Ruby interpreter
• Rubinius – alternative Ruby implementation, based loosely on the Smalltalk-80 Blue Book design.
• Ruby MRI – the standard Ruby interpreter
• YARV – "Yet Another Ruby VM," the bytecode interpreter used in modern Ruby implementations

• Homebrew – package manager for macOS and Linux written in Ruby
• Pry – interactive Ruby shell
• Rake – build and task management
• Ruby Version Manager – environment manager
• RubyCocoa – bridge between Ruby and Cocoa
• RubyForge – project hosting site
• RubyMotion – for iOS/macOS development
• RubySpec – language specification tests

• Aptana Studio — integrated RadRails plugin for Ruby on Rails development
• Eclipse DLTK Ruby Plugin — Ruby development plugin for Eclipse
• Eric — open-source Python-based IDE with Ruby support
• Komodo IDE — commercial cross-platform IDE with Ruby support
• RubyMine — commercial IDE for Ruby and Rails by JetBrains
• SlickEdit — commercial cross-platform IDE with Ruby support

• Airbnb
• Basecamp
• Diaspora – decentralized social network application built with Ruby on Rails
• Discourse – open-source discussion platform built with Ruby on Rails
• Fiverr
• GitHub
• Hulu
• Shopify
• SoundCloud
• Twitch^[1]
• Zendesk

• Free software programmed in Ruby
• List of C software and tools
• List of C++ software and tools
• List of C# software
• List of Java frameworks
• List of JavaScript libraries and Comparison of JavaScript-based web frameworks
• List of Python software
• List of Ruby programming books
• Network Applied Communication Laboratory (NaCl) – Ruby research lab
• Ruby Central – Ruby advocacy organization
• RubyKaigi – annual Ruby conference

• asyraffff/Open-Source-Ruby-and-Rails-Apps
• Awesome Ruby
• TOP 65 Ruby Open Source Projects in 2025