A necessary evil. 

- [PHPBB](https://www.phpbb.com/) - create fully featured Bulletin Board Forums for free
- DokuWiki was suggested to me as a wiki that generates in PHP and thus not needing to write in it ([Template Engine](https://en.wikipedia.org/wiki/Template_processor))
- [WackoWiki](https://wackowiki.org/doc/) was found when trying to search for DokuWiki