Entwine is a Python implementation of Zope Page Templates with it's own lexer/parser for a subset of XML (it only cares about the structure of your document, and the syntax of your tags).
Entwine is licensed under the GNU General Public License, and is copyright 2003 Sune Kirkeby.
The subversion repository is dead and buried, and I haven't had time to convert it into git, so Entwine i off-line until forther notice.