Zope Page Templates
http://zpt.sourceforge.net
"Zope Page Templates is a Python package that implements Page Templates like in Zope, but works outside of Zope."
Templates TAL Example - Bitflux CMSWiki
http://wiki.bitflux.org/Templates_TAL_Example
Interesting: XSL which, when given a ZPT-like template as input, produces XSL to implement the template.