Ask HN: Best PM/code hosting/bug tracking solutions for a RoR Startup?

Specifically, a startup with a small number of coders using Ruby on Rails, Heroku, and Git.<p>The goal is for tools that get out of the way and naturally lend themselves to best practices such as Test-Driven-Development, Continuous Integration, and rapid Agile iteration.<p>Cost doesn't matter. Developer happiness and efficiency does.