Next week I’m sure Rails will be completely passé in favor of Merb (managed by git, of course). But for now, here’s the stuff that makes me a happy programmer this weekend:

Rspec With Xpath.
Autotest/Zentest
Continuous Integration (a practice not an app.)
CruiseControl.rb (see this for Rails).
CSS Dryer. Here’s my last ramble about server parsed CSS.