The INDEX prize also awarded the $100 laptop designed for Third World children.
The Danish award began in 2005 "to celebrate design that not only looks good but also improves lives of people all over the world," according to Kigge Hviid, manager of the award foundation.
"Great design is a way to tell people that you value them," said Yves Behar, a Swiss designer who was part of the team behind the "XO" portable computer.
The laptop is now estimated to now cost $175 which is still inexpensive.
Canadian Sebastien Dubois' prosthetic foot was designed for land mine victims.
The Tesla Roadster electric sports car is made by California-based Tesla Motors.
The Prize awards are available at the INDEX site.