xCSS : xCSS bases on CSS and empowers a straightforward and object-oriented workflow when developing complex style cascades.
Flask : Flask is a microframework for Python based on Werkzeug, Jinja 2 and good intentions. And before you ask: It's BSD licensed!
Clearbricks : No, Clearbricks is not yet another framework. Clearbricks is not cool at all and does not even have a nice website. It won't make you smart neither ha...
Silex : The PHP micro-framework based on Symfony2 Components
Symfony : Symfony is a set of reusable PHP components and a PHP framework for web projects.
A powerful yet easy-to-use PHP micro-framework designed to help you build dynamic and robust Web applications - fast!