You'll be able to pay what you like for a littleBIGbunch bundle of games containing Frozen Synapse, Explodemon, Serious Sam: Double D, Oddworld: Munch's Oddysee and New Star Soccer 5.
Not only can you pay what you like, you can specify who gets the dough. You can give all of the money to GamesAid if you like, or to the developers. Or you can split the money so that some goes to GamesAid and some goes to the developers.
And Just Add Water is responsible for porting Oddworld: Munch's Oddysee (8/10 Eurogamer, as part of a Steam bundle).
GamesAid collaborates with the video games industry to collect money for various charities aimed at young people and children.