Google's Summer of Code has been running for a few years now, and is an established and important fixture for the free software world:
Since its inception in 2005, the program has brought together over 4500 successful student participants and over 3000 mentors from over 100 countries worldwide, all for the love of code.
An obvious question is: where are all those participants coming from? Now we know; here are the top ten countries by student count:
On Open Enterprise blog.