http://www.aaai.org/Pathfinder/pathfinder.html
AI Topics is a web site designed to provide online access to introductory resources concerning artificial intelligence and its many dimensions.
http://www-2.cs.cmu.edu/afs/cs.cmu.edu/project/ai-repository/ai/0.html
Free software and materials of general interest to AI researchers, educators, students, and practitioners.
http://openai.sourceforge.net/
The OpenAI site is centered around an Open Source project and community involving artificial intelligence. The term "Open Source" means that the source code for the project is available for free and can be used by others free of charge.
