Fossil: Fossil Home Page - the author of SQLite, my preferred tool for everything that needs to store data locally, has also built his own distributed version control system (à la Mercurial or Git). And it comes with an integrated, distributed wiki and an integrated, distributed bug tracking system. Of course, the whole thing is based on SQLite as the backend for storing the data and has some interesting properties. Definitely worth a look, especially since its installation is nearly perfect: just copy a ready-made executable into the path, that's it. Yep, version control, wiki, bug tracking, CGI for web interface - all in a single executable. It's also compact. Impressive.