DokuWiki is an open source wiki application licensed under GPLv2 and written in the PHP programming language. It works on plain text files and thus does not need a database.

I usually install the following plugins:

• Bureaucracy Plugin de Andreas Gohr: Create forms and generate pages or emails from them.
• caption plugin de Till Biskup: Adding figure and table captions.
• cmsmode plugin de Andreas Gohr: Hide Wiki Features from non-logged in users.
• color syntax plugin de Harald Hanche-Olsen: Write colored text in DokuWiki.
• Gallery Plugin de Andreas Gohr: Creates a gallery of images from a namespace or RSS/ATOM feed.
• Move plugin de Michael Hamann, Gary Owen, …: Move and rename pages and media files whilst maintaining the links.
• Wrap Plugin de Anika Henke: Universal plugin which combines functionalities of many other plugins. Wrap wiki text inside containers (divs or spans) and give them a class (choose from a variety of preset classes), a width and/or a language with its associated text direction.
• XBR Plugin de Christopher Smith: A replacement for the standard dokuwiki renderer which keeps your line-breaks.