Turing complete template engines
Virtually anything that allows procedural code to compute the template result.
What template engines / template languages are turing complete? I heard about these so far:

FreeMarker (implemented in java)
MovableTypes template language (in perl)
xslt :-(
Cheetah (in Python)
Smarty (in PHP)

Any others (especially implemented with perl)?
Ps: Don't waste time with clarifying me MVC, and why turing complete templates are bad, and why this is not a useful comparison point :)