A library of neat Rails application templates.
RSpec-esque matchers for Test::Unit
A super tight library to add contexts to tests.
Parse TOML. Like a bawss.
**!! THIS IS NOW IN RAILS CORE!!** Generate Rails apps from programmatic templates. Skip all the git cloning!
New router for Rails. Tiny (200 lines fool!), quick (adding routes so fast it hurts and competes with current router otherwise), and agile (OK...it's not more agile. But it sounds cool.)