Pants was the blog engine behind wonko.com before it was replaced by Thoth. It's a minimal engine that has support for blog posts with comments and tagging, pages with wiki-style linking, and full text search. It's highly customizable and optimized for speed, capable of serving well over 100 requests per second on a moderately powerful server.

There are no official releases of Pants, but you're more than welcome to grab the code from the SVN repository.

Note: Pants is no longer being developed, so you're pretty much on your own.