WabiSabi

Template:Wiki Engine WabiSabi Wiki was an experimental wiki engine created by Felix Pleşoianu from a mere 275 lines of PHP, with flat file storage. It was inspired from the original wiki engine – WikiWikiWeb, along with Pawfaliki and Pwyky. The name comes from a Japanese aesthetic that is reflected in the project's current goals. It including a decent markup engine, page backups, anti-spam protection, and plugin system.

The engine was developed between 2009 and 2012; last known install was from December 2015. People discussed it, used it, modified it. But my interests have shifted, and I can't afford to worry about yet another live wiki anymore.