It uses rocket links throughout, making for a very distinct authorial voice.
The database is contained in a single JSON file that can be manipulated with many 3rd-party tools; that means you can only have so much text on any one wiki, but backups become very easy, and you are never locked in.
Otherwise, BrutalWiki is geared towards personal use. It tries to be somewhat robust and secure, but isn't exactly industrial-strength.
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.
BrutalWiki has a carefully chosen set of features, in order to limit scope and keep the project manageable:
Single PHP script; the base edition is only 200 lines of code!
Database kept in a single JSON file for easy backup and 3rd-party access.
Wiki syntax that can be rendered through simple text substitution.
The usual conveniences are also available:
Password-based security, mostly to prevent spam;
a decent set of configuration options;
custom stylesheet, logo and icon;
preview button, recent changes and summaries;
custom footer and navigation menu;
page search, page index and statistics;
error 404 is properly returned for non-existent pages.
On top of that there are some extra features:
custom syntax and actions can be easily added in config;
the wiki can be set to read-only mode with an option.
More are planned and will be added as time allows.