Things in my dot repo [0]:
git-overview: Short report about top committers, files with most commits and most authors. Nice when you checkout a non-trivial repo for the first time.
git-onNotify: Do something (like `make`) whenever a tracked file changes. Usually used to build LaTeX and static websites.
git-randomline: Chooses a random file and a random line number there. The game is explain that single line to some fellow. Do this repeatedly to spread knowledge about a codebase.
git-tarball: Pack the repo into a tar.bz2 file.