Yaki is a Wiki-like CMS written in Python that relies on filesystem storage and caching.

It was used as the underpinnings of the The Tao of Mac, and is based on the excellent Snakelets application server.

Sites Using it:

• Moo (the testing grounds, occasionally off-line with a static page)
• uszla.me.uk (Toby White's XHTML-compliant tweaks, shaping up nicely)