CsaWiki is a very small wiki engine developed by Carlos Silva.

* Runs on any servlet container from JSP 1.1 and servlet 2.1 (i.e. Tomcat 3.x)

* It's opensource with Apache 2.0 license.

* Includes a small search engine and a specific wiki syntax. 

* Supports Wiki Extraction (or wiki tree) using iText (PDF).

* Supports restrictions on wiki write access to users.

It's under development since Nov. 2004.

See http://ghannid.homeip.net/wiki/MiniWiki.wiki

The site is in Spanish, and it's used as a personal site.