LionWiki is a minimalist file-based (doesn't need a database), templatable, extensible wiki engine that works from just one file (30KB). It supports page history, recent changes, interface localization, password protection (both writing pages and seeing), and much more through plugins (CAPTCHA, RSS, syntax for Tables). It's intended for small personal Web sites, notebooks, and other simple applications. Installation is very easy: just copy the file and create a directory.
License: GNU General Public License v2
Changes:
Edit conflicts are prevented. A Tags plugin was added. The Dandelion template was added. Full PHP4 compatibility (for 4.3.0 and later) is ensured. Some SEO was done. Optional XSS protection was added.
More...