DokuWiki
DokuWiki is an open source wiki application that is extremely lightweight.
DokuWiki is a standards compliant, simple to use wiki, mainly aimed at creating documentation of any kind. It is targeted at developer teams, workgroups and small companies. It has a simple but powerful syntax which makes sure the datafiles remain readable outside the Wiki and eases the creation of structured texts. All data is stored in plain text files--no database is required.
Features:
- Built-in Access Control Lists
- Large variety of extensions
- Device independent
MediaWiki
WikkaWiki
PmWiki