ripl is a light, modular alternative to irb. Like irb, it loads ~/.irbrc, has autocompletion and keeps history in ~/.irb_history. Unlike irb, it is highly customizable via plugins and supports commands. This customizability makes it easy to build custom shells (i.e. for a gem or application) and complex shells (i.e. for the web).

“htty is a console application for interacting with HTTP servers. It’s something of a cross between curl and the Lynx browser.”

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            __________\/_____\/____________________
           /   |   \__    ___/\__    ___/\______   \
          /    ~    \|    |     |    |    |     ___/
          \    Y    /|    |     |    |    |    |
           \___|_  / |____|     |____|    |____|
           ______\/___________________.___.
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                                  \/

“An ActiveModel-compliant persistence framework for Ruby that uses Git for versioning and remote syncing”

Dolphin is a feature flipper, as Rails plugin. Use it to flip areas of your app on your off, based on pre-defined conditions.  

Rackspace…OpenSource

PIE makes Internet Explorer 6-8 capable of rendering several of the most useful CSS3 decoration features

awesome one-page Tutorias in JS

sexy_scope is a small wrapper around Arel::Attribute that adds a little syntactic sugar when creating scopes in ActiveRecord. It adds an attributeclass method which takes an attribute name and returns an Arel::Attribute wrapper, which responds to common operators to return predicates objects that can be used as arguments to ActiveRecord::Base.where.

“Why gave us a lot of cool software, but what he really gave to the Ruby community was a spirit of freedom, whimsy, and creativity. When Why took the stage at the first RailsConf, in 2006, he strapped on his guitar, walked to the microphone, and yelled “Put your best practices away!”

jo is a lightweight JavaScript framework designed for HTML5 apps.

“OpenGL-based 3D visualisation tool for source control repositories.

The repository is displayed as a tree where the root of the repository is the
centre, directories are branches and files are leaves. Contributors to the
source code appear and disappear as they contribute to specific files and
directories."

On OSX and using homebrew? brew install gource