Free online game creators

So many people like those little Flash games, I have to admit I'm not a big fan. However, with Little T growing up, he's at the age where creating his own games would be a pretty big thing.

Compiled this list of free online game creators. They all look very cool in their own way:

http://www.playcrafter.com

http://www.sploder.com

http://www.popfly.com (Silverlight)

The cool thing about these sites is that they all try to give game creators a way to share their games and even start a revenue stream.

I'd love to explore creating educational games, maybe embedding them within e-learning courseware?

Does anyone have any opinions or other alternatives?