The team at Humble Bundle started the trend of offering games for a limited time on the "pay what you want model". So far the five previous bundles have generated millions in revenue that are shared by various game developers. Today, the team has launched Humble Indie Bundle 6 with a new set of games to get on the cheap or as much as you can afford.
According to the site:
Name your price and dive into the critically acclaimed action-RPG Torchlight; the rugged sci-fi action platformer Rochard; physics-based brick breaker Shatter; top down space combat sim Space Pirates and Zombies; and steampunk puzzle platformer Vessel. Customers who beat the average price will also get the incredible frantic acrobatic platformer, Dustforce!
As with the previous Humble Indie Bundle events you can also choose to donate money to two charities, the Humble Indie Bundle 6 will end two weeks from now.
Source: Humble Bundle website