The only other one of this sort of scope of which I am aware is the science and engineering competition held by Intel [0]: US $75,000 for winner, 2 awards of $50,000 each, and 17 best of category awards of US $5,000 ea. Then smaller dollar amounts for the next 5 finishers in each category.

[0] http://www.intel.com/content/www/us/en/education/competition...