Nokogiri (鋸) makes it easy and painless to work with XML and HTML from Ruby.

A runtime developer console and IRB alternative with powerful introspection capabilities.

FXRuby is an extension module for Ruby that provides an interface to the FOX GUI toolkit.

JRuby, an implementation of Ruby on the JVM

Ruby string class extension. It add some methods to set color, background color and text effect on console easier using ANSI escape sequences.

Ruby gem for ANSI terminal colors 🎨︎ VERY FAST

Ruby enVironment Manager (RVM)

Self-contained Ruby binaries that can run on any Linux distribution and any macOS machine.

Manage your app's Ruby environment

🔬 A Ruby library for carefully refactoring critical paths.