Git for Philosophers
A basic introduction to the revision control system Git for non-programmers, specifically for using Git as a way to collaborate on document writing.
The guide is written in Markdown, the file is git4phi.md, and can be read here. You can download the latest release, including a printable PDF version, here
It is written by Richard Zach
You should feel free to copy & use this as long as you abide by the CC-BY license.