BlackBox : Safely store secrets in a VCS repo (i.e. Git, Mercurial, Subversion or Perforce).
Git Common-Flow : Common-Flow is an attempt to gather a sensible selection of the most common usage patterns of git into a single and concise specification. It is based...
scriv : Scriv is a command-line tool for helping developers maintain useful changelogs. It manages a directory of changelog fragments. It aggregates them into...
Pro Git : The entire Pro Git book, written by Scott Chacon and published by Apress, is available here
PuPHPet : A simple GUI to set up virtual machines for Web development.
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.