Mocha is a library for mocking and stubbing using a syntax like that of JMock, and SchMock. Most commonly Mocha is used in conjunction with Test::Unit, but it can be used in other contexts.

One of its main advantages is that it allows you to mock and stub methods on real (non-mock) classes and instances. You can for example stub ActiveRecord instance methods like create, save, destroy and even class methods like find to avoid hitting the database in unit tests....

Ohai detects data about your operating system. It can be used standalone, but it's primary purpose is to provide node data to Chef.

Ohai will print out a JSON data blob for all the known data about your system. When used with Chef, that data is reported back via node attributes....

YARD is a complete Ruby documentation tool which obsoletes and replaces RDoc with feature enhancements and a better system design for plugin modularity. YARD targets documentation writers as well as code analysts to provide a huge amount of introspection both to documentation and code....

Mongoid is an ODM (Object Document Mapper) Framework for MongoDB, written in Ruby.

Ruby/EventMachine is a fast, simple event-processing library for Ruby programs. It lets you write network clients and servers without handling sockets- all you do is send and receive data. Single-threaded socket engine- scalable and FAST!

A grid-based manual tiling window manager with a strong focus on easy but customizable look and feel

Noosfero is a social web platform. Among other things, Noosfero bring the features: * CMS: articles, blog, etc * social networking: sharing interests, thematic discussion, etc * eCommerce * Free Image Database * and more with Plugins

Noosfero is free software, released under GNU Affero General Public License (AGPL), version 3....

The Qpid Project provides an open and interoperable, multiple language implementations of the Advanced Messaged Queuing Protocol (AMQP) specification and related technologies including PGM, transaction management, queuing, distribution, security, management and heterogeneous multi-platform support for messaging....

rails.vim is the one true Vim plugin for syntax highlighing, easy navigation, and script invocation for all your Ruby on Rails applications, transparently and unobtrusively.

Passenger is a deployment system for Ruby web applications on Apache. Ruby deployment becomes an "upload & done" process.

Please visit http://www.modrails.com/ for the main website.