IdolHands.com :: Days in the Life of an Alpha Geek
Don't reinvent the wheel! Find the right gem, plugin, or engine to provide the functional building blocks for your Rails application.
Since GitHub stopped hosting gems, Gemcutter has become the defacto standard for hosting and retrieving the latest and greatest gems that the community has to offer.
http://gemcutter.org/
GitHub is a great source for Rails plugins and engines and Ruby gems. More than a series of repositories, it has integrated issue tracking and wiki capabilities, and has features that make it extremely easy to fork and contribute to other projects. Hosting your public repositories is free.
http://github.com/