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IBM Worklight Foundation: your open mobile application platform for smartphones and tablets
Build the next generation of cloud on open standards with IBM Cloud Manager based on OpenStack
IBM Big Data
Turn open source big data technology into a big data platform
Visit IBM developerWorks for a useful guide to all the basics
Play the Game: Code Rally
Code Rally is a free, open source racing game with a twist -- instead of racing around a track using a controller, you program an AI (artificial intelligence) controlled car to race for you!