"Desktop applications such as Firefox, Thunderbird, and the GIMP are not the only ones that can use extensions and plugins for added functionality--some Web-based programs can too. DokuWiki, for example, is a great wiki system by itself, but since it can accept plugins, you can easily add some nifty features to it.
"The best place to find DokuWiki plugins is the DokuWiki Plugins page, which acts as a central repository and discussion forum for plugin-related stuff. But before you can make use of the plugins, you need to know how to install them..."
