Humble Indie Bundle 11 is live offering up to six games if you are willing to pay more than the average price. Humble Indie Bundle 11 offers four games for any price you want to pay: including action-platformer Guacamelee! Gold Edition, action RPG Dust: An Elysian Tail, atmospheric puzzle-platformer The Swapper, and hardcore platformer Giana Sisters: Twisted Dreams (includes a digital comic).
Pay more than the average price (currently hovering at right around $4) and you'll get the psychological exploration game Antichamber, and the heist game Monaco: What's Yours is Mine. More games will be added later. All of the games, save Giana Sisters: Twisted Dreams are available for Windows, Mac, and Linux too.
Charities being supported by Humble Indie Bundle 11 are Child's Play and the Electronic Frontier Foundation.
As of this writing this bundle has already generated over $360,000... Find out more at www.humblebundle.com.
Thanks to Andrew Eisen for the tip.