Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
Zim Wiki - Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images.
Oddmuse - Oddmuse is a wiki engine.
TiddlyWiki - a non-linear personal web notebook
MoinMoin - MoinMoin is an advanced, easy to use and extensible WikiEngine with a large community of users.
VoodooPad - VoodooPad is a personal wiki developed for the Mac OS. It lets users create a personal wiki by giving them the ability to manage a network of pages right from the desktop.