scriv : Scriv is a command-line tool for helping developers maintain useful changelogs. It manages a directory of changelog fragments. It aggregates them into...
gollum : A simple, Git-powered wiki with a sweet API and local frontend.
git-deploy : Straightforward, Heroku-style, push-based deployment. Your deploys can become as simple as this:
$ git push production master
Git Extensions is the only graphical user interface for Git that allows you control Git without using the commandline. It comes with a manual and video tutorials to get you started quickly.