Google Code-in, a global online contest for pre-university students (13-17 years old)

For the next seven weeks students from around the world will be able to choose from an extensive list of tasks created by 10 open source projects. Some tasks require coding in a variety of programming languages, creating documentation, doing marketing outreach or working on user interfaces.

Participants earn points for each task they successfully complete to win T-shirts and certificates. At the end of the contest, 20 students will be selected as grand prize winners and flown to Google’s Mountain View, California headquarters. Winners will receive a trip to San Francisco, a tour of the Googleplex and a chance to meet with Google engineers.
bejelentes: http://googleblog.blogspot.hu/2013/11/from-your-cs-class-to-real-world-…
a verseny oldala: http://www.google-melange.com/gci/homepage/google/gci2013
List of organizations accepted into Google Code-in 2013: http://www.google-melange.com/gci/accepted_orgs/google/gci2013