Simple, but flexible HTTP client library, with support for backends
Object-oriented views in Ruby
Guard is a command line tool to easily handle events on file system
Google Toolbox for Mac
Code coverage for Ruby with a powerful configuration library
A library for setting up Ruby objects as test data
Classy web-development dressed in a DSL
The administration framework for Ruby on Rails applications
Bash scripts that declare aliases and copy code templates.
Open source API management platform
A modern gem manager: Gel is a lightweight alternative to Bundler
msf post-exploitation auxiliary module
A collection of well-documented iOS classes for making life easier
Octopress is an obsessively designed framework for Jekyll blogging
Personal Coding Dojo, for several technologies.