Plenty of quality to check out in the Humble Jumbo Bundle 2; popping down a few bucks will earn you Deadlight, The Incredible Adventures of Van Helsing and Galactic Civilizations 2.
Matching the average donation price will add Terreria, King of Fighter XIII and the mighty Crusader Kings 2, along with a few DLC unit packs. CK2 makes this worth the price of admission alone.
If you go one step further and cough up the not unreasonable sum of $15 you'll earn the Age of Empires Legacy Bundle. There's really not a bad game in that whole bunch, and in fact several of them will keep you entertained for a good, long while.
And that's still not all. Six more mystery games are coming to this same bundle next Tuesday, and if you beat the average price right now you'll automatically unlock them when they arrive. That's some good Humble.
The charities benefiting from a percentage of sales are the American Red Cross and Child's Play. As usual, all codes redeem on Steam.