jade looks interesting, had not heard of it before and will be looking closely at it for sure.

I'd like to also recommend Nickolay Platonov's little-known but powerful JS templating library "Shotenjin":

https://github.com/SamuraiJack/Shotenjin

Shotenjin is built with Joose v3, which also rocks:

https://github.com/Joose/Joose