Difftastic is an experimental diff tool that compares files based on their syntax.

Code evolves, and we all spend time studying diffs. Delta aims to make this both efficient and enjoyable: it allows you to make extensive changes to the layout and styling of diffs, as well as allowing you to stay arbitrarily close to the default git/diff output.

Git version of vim with integrated patches

Comparision between git mercurial and bazaar

Illustrated introduction to distributed VCS

Project managment portal, with versionning tools (bzr, hg, svn, git) and trac