Symfony Components: Templating
(source: symfony-project.org)
Symfony intends on moving to a new templating system based on the lightweight PHP templating system twig.
The lead developer Fabien Potencier, explains the decision here: http://fabien.potencier.org/article/35/templating-engines-in-php-follow-up
Symfony can usually be replied upon to make very informed decisions on such matters, so this framework should be something to look into.
The component is here: http://components.symfony-project.org/templating/
