We are trying to help students get inexpensive and professional tools for developing games. This list is not comprehensive and we welcome suggestions for additional development tools. Thanks to Michael Lubker from the Austin Independent Game Developers for the help on this list.

Blitzmax
Clickteam
Unity
Flash
Wildtangent
Metaplace (NEW!!)
PopCap
Edgelib (mobile phones)
Pygame
Soya
OpenRTS
iPod Linux
Torque