ErfurtWiki is a small yet highly customisable wiki engine, compiled in PHP. It is free open source software, and is an implementation of the WikiWikiWeb hypertext system. It allows everybody who comes along to edit and create new pages very easily. It is available four languages: German, English, Spanish, and Dutch.
Although the software has not seen any updating since June 2005, it is still available for download from the SourceForge website. Whilst this lack of development may loose favour by some, it is nonetheless a very valuable wiki engine, for a number of important, and unique reasons. One of those is that it can be run on any operating system with PHP support, including Android, and can be easily integrated into any existing website. ErfurtWiki supports virtually all forms of wiki syntax, including unlimited page revision histories. Free links, backlinks, and CamelCase linking is provided as standard, with features such as interwiki, sister wiki, image links, and page redirects supported by an extensive range of over 200 plugin extensions.