ogura's Stars
thoughtbot/paperclip
Easy file attachment management for ActiveRecord
mbleigh/acts-as-taggable-on
A tagging plugin for Rails applications that allows for custom tagging along dynamic contexts.
psychs/limechat
IRC Client for Mac
mojombo/grit
**Grit is no longer maintained. Check out libgit2/rugged.** Grit gives you object oriented read/write access to Git repositories via Ruby.