Zend Framework
I been checking out the Zend Framework lately and just love it. Compared to Codeigniter the documentation is a bit harder to follow but once you get the hang of it well there is just no comparison Zend Framework is way futuristic and open. With open I mean it has less constrains.
I am a hobby programmer so my code might not be profesional great but it works and its for free if you like to check it out or just get ideas go ahead feel free to do so.
Codeigniter
My applications libraries, helpers, plugins etc
Please read the wiki!