A simple, Git-powered wiki with a local frontend and support for many kinds of markup and content.

RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data

Decorators/View-Models for Rails Applications

Thor is a toolkit for building powerful command-line interfaces.

Cucumber for Ruby. It's amazing!

Fast, Nimble PDF Writer for Ruby

A Really Ruby Mail Library

Chronic is a pure Ruby natural language date parser.

Dynamic nested forms using jQuery made easy; works with formtastic, simple_form or default forms

An invitation strategy for devise

A taggable image board written in Rails.

Heavy metal SOAP client

A collection of Ruby Net::HTTP examples.

(offically at github.com/sinatra/sinatra) Classy web-development dressed in a DSL

Terminal automation

A Rubyesque interface to Gmail, with all the tools you'll need.

Provide a standard and simplified way to build and package Ruby C and Java extensions using Rake as glue.

Simple Ruby HTTP/REST client with a sane API

Javascript + DOM in your ruby, the simple way

Rails helpers to generate beautiful css3 buttons, based on the 'css3-github-buttons'

Harmony plugin for Ruby on Rails tests

Free ebook about Ruby 1.9

Simple Hash extension to make working with nested hashes (e.g. for configuration) easier and less error-prone.

Handlebars Template Handler for Rails

[Ruby] A configuration library for Ruby. a simple, feature rich, elegant way in pure Ruby. Hash compatibility.

must_be runtime assertions for Ruby.

The ultimate DRY and fast solution to loading test data in Ruby and Rails.

A basic example for an OpenID consumer using Sinatra - This is mainly for learning purpose. You should checkout rack-openid, warden or the like.

Spreadsheet::ParseExcel - Get information from an Excel file. Modifying to port font support