Context framework extracted from Shoulda

Manipulate and transform HTML/XML documents and fragments

It will find translations inside your .js and .coffee files, then it will create JSON versions of your .PO files and will let you serve them with the rest of your assets, thus letting you access all your translations offline from client side javascript.

A StatsD client for Ruby apps. Provides metaprogramming methods to inject StatsD instrumentation into your code.

FriendlyId is the "Swiss Army bulldozer" of slugging and permalink plugins for Active Record. It lets you create pretty URLs and work with human-friendly strings as if they were numeric ids.

Turbolinks JavaScript assets

A support libraries and Ruby core extensions extracted from the Rails framework

Apipie-rails is a DSL and Rails engine for documenting your RESTful API. Apipie lets you describe the code, through the code. This brings advantages like

Produce the meta message for Cucumber Ruby

If you write puppet modules for installing your software, you can use kafo to create powerful installer

Mock object library for ruby

Simple testing API built on Rack

Fast mime detection by extension or content

Simple callback-based HTTP request/response parser.

Extraction of the XML parsing tools shared between a number of providers in the 'fog' gem.