The Humble Frozen Synapse Bundle. A selection of multi-platform, DRM free games to download. Pay what you want and also decide how much goes to charity. I’ve not done it yet but might. Not sure the games are the type I’d play – must have been years since I last played a platformer – but could take a punt for the sake of charity.
If you miss it this time around I’m sure it will be back so keep an eye out. This is the second time (at least) I’ve seen it done.