Another vim plugin I love enough to feature here is git-vim which gives you convenient access to git commands from inside of vim. I only use a few of them (and only in their base form) - but I find them pretty indispensable:

:GitLog

Will open a git log in a new buffer of the changes to the current file

:GitBlame

Will open a vertical buffer containing the line-by-line blame of the current file

:GitDiff

Will open a buffer next to the existing buffer, with its current diff