The Humble Jumbo Bundle 3 offers a variety of games at pay what you want prices!
Right now you can pay what you want for Tesla Effect: A Tex Murphy Adventure, Always Sometimes Monsters, and Insurgency (1 for you, 3 to share). If you share Insurgency, you can tag on Full Mojo Rampage for free! If you pay $1 USD or more, you get Steam keys for these games. Pay more than the average price of $6.10 USD and you can also get GRID 2, Blackguards, and Euro Truck Simulator 2. More games will be coming soon to this section! If you pay $12 USD or more, you can add on Saints Row IV.
Humble offers games at low discounted prices, while also supporting charity with every purchase. As always, the customer can split their payment between charity, game developers, and Humble tip before checkout.
Check out the Humble Jumbo Bundle 3 here: https://www.humblebundle.com/