Gollum is a simple wiki system built on top of Git that powers GitHub Wikis.
Gollum wikis are simply Git repositories that adhere to a specific format. Gollum pages may be written in a variety of formats and can be edited in a number of ways depending on your needs. You can edit your wiki locally:
* With your favorite text editor or IDE.
* With the built-in web interface.
* With the Gollum Ruby API.