Ask HN: Self-Hosted Development Team Tools

Assuming that you were to self-host all the tools for your development team (and yes, I know this is a big assumption), what tools would you use? I'm thinking things like a web frontend to source code repositories, issue tracking, continuous integration, IRC, etc.

Following on this, if there was a single package or virtual machine image that would install and setup all these tools up with reasonable defaults (especially integrating with each other), a la MAMP/XAMPP, would you use it?