Addressable is a replacement for the URI implementation that is part of Ruby's standard library. It more closely conforms to RFC 3986, RFC 3987, and RFC 6570 (level 4), additionally providing support for IRIs and URI templates.
Airbrussh pretties up your SSHKit and Capistrano output
Autoprefixer for Ruby and Ruby on Rails
Pretty print your Ruby objects with style -- in full color and with proper indentation
Better error page for Rack apps
Ruby Implementation of the BSON Specification (2.0.0+)
help to kill N+1 queries and unused eager loading
Manage your application's gem dependencies with less pain
Patch-level verification for Bundler
Debugging in Ruby 2
Acceptance test framework for web applications
Extend rails application
CI::Reporter is an add-on to Test::Unit and RSpec that allows you to generate XML reports of your test and/or spec runs.
Mirror of official clang git repository located at http://llvm.org/git/clang. Updated hourly.
A small library for doing (command) lines.
Fast and easy syntax highlighting for selected languages, written in Ruby.
Istanbul and JSCoverage-style instrumentation for CoffeeScript files.
CoffeeScript adapter for the Rails asset pipeline. Also adds support for .coffee views.
Ruby string class extension. It add some methods to set color, background color and text effect on console easier using ANSI escape sequences.
High performance memcached client for Ruby
Strategies for cleaning databases in Ruby. Can be used to ensure a clean state for testing.
Flexible authentication solution for Rails with Warden.
Devise Module for LDAP
EventMachine: fast, simple event-processing library for Ruby programs
Examples for rroonga.
An embeddable fulltext search engine. Groonga is the successor project to Senna.