Breve

Breve is a Python template engine that works with any Buffet-API compatible web framework (TurboGears, CherryPy, Pylons) as well as Django.

More details, documentation and examples can be found on the main Breve site.

There is also a 3rd party adapter in progress to support Trac: BreveTrac - plugin for Trac (similar to the TurboStan adaption called TraciStan).