OpenClick is open source (GPL) game creation software, similar to Clickteam's popular "The Games Factory". It is designed with wxPython and Pygame, and should be usable on all major platforms (Windows, OS X, and Linux).
OpenClick is designed to be simple but powerful. It will have many features to make game design accessible to non-programmers, including an easy way to script your games. Its level editor and "export to source" features make it useful to programmers, who may wish to use it for rapid prototyping.
This software's development is on hold. If you would like to see our current progress, visit our project page at http://www.sourceforge.net/projects/openclick.
OpenClick was founded by the members of Smiley Productions, a group that produces free and open source games.