CodeIgniter - Open source PHP web application framework
Now this looks fab
ResourceSpace: Open Source Digital Asset Management (DAM)
ResourceSpace is a web-based, open source digital asset management system which has been designed to give your content creators easy and fast access to print and web ready assets.
Vikjavev.no - Unsharp Mask for PHP
Clever
Augmented Reality – Create your own Layar Layer!
Fredrik Davidsson, developer of the WAYD layer, has shared his code with the developer community! This code enables you to create a content Layer with PHP. Now PHP developers don’t have to reinvent this wheel.