Mycorrhiza Wiki is a lightweight file-system wiki engine that uses
Git for keeping history.

Features:

* No database required.
* Everything is hyphae.
* Hyphae are authored in Mycomarkup, a markup language that's
  designed to be unambigious yet easy to use.
* Categories let you organize hyphae without any hierarchy
  restrictions, with all the benefits of a category system.
* Nesting of hyphae is also supported if you like hierarchies.
* History of changes for textual parts of hyphae.
* Keyboard-driven navigation.
* Support for authorization.
* Open Graph support.
* Interwiki support.