DokuWiki: Wiki for Team Development

DokuWiki is a simple, clean and easy to use a Wiki system that allows collaborative editing of a web site. It's focused on creating documentation for developer teams, workgroups and small companies.

It is highly usable, fast, extensible, easy to integrate and is fully international. It has a simple but powerful syntax which makes sure the datafiles remain readable outside the Wiki and eases the creation of structured texts. And all data is stored in plain text files – so no database is required.