As of 2021, the days when every web nerd made their own pet wiki engine for fun are past. BrutalWiki is a throwback. Think of it as a toy or art piece.
Since you're still reading, here are the technical details.
BrutalWiki is a wiki engine written in PHP, with some unique traits:
Otherwise, BrutalWiki is geared towards personal use. It tries to be somewhat robust and secure, but isn't exactly industrial-strength.
The save function is password-protected, but you can try it on your own server (19K zip file):
The current version is 1.3.1 as of 11 August 2021. You can have it under the terms of the Artistic Licence 2.0 (also included in the download). See inside for how to get support, and other useful information.