PHPmonkeys.com

www.docblox-project.org - A PHP 5.3 compatible API Documentation generator aimed at projects of all sizes and Continuous Integration

openshift.redhat.com - A cloud-based application platform for PHP, Java, Perl, Python, and Ruby applications

www.addedbytes.com - Handy reference listing date format arguments, regular expression syntax and other common functions.

ocw.mit.edu - Free electrical engineering and computer science courses from MIT.