Need to pick up a little AJAX knowledge to give your website a bit of polish? Have less than a robust knowledge of how databases work? Google Code University offers a heaping helping of computer science knowledge for free.

Even better, the site includes a CS Curriculum Search, which can find programming topics within materials published by the world’s computer science schools. So if you only need a specific bit of PHP knowledge to move a project along, you might find just what you’re looking for without having to plunk down cash for a thick manual. Would-be hackers looking into Firefox extensions and basic JavaScript, this is a great place to start.

The Courses section contains tutorials, lecture slides, and problem sets for a variety of topic areas:

• AJAX Programming
• Distributed Systems
• Web Security
• Languages

In the Tools 101 section, you will find a set of introductions to some common tools used in Computer Science such as version control systems and databases.

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