The team at Humble Bundle have once again partnered with the Yogscast YouTubers to sell a special "Jingle Jam" pay-what-you-want game bundle, with a percentage of the proceeds going to charity. Unlike most Humble Bundles, that percentage is 100 percent.
It's a nice thing for a major game industry storefront to do, and suggests either the devs involved ceded copies of their games to the promotion for free, or Humble is reimbursing them in some way for participating.
Like most Humble Bundles, the Jingle Jam offers varying access to three tiers of games/rewards depending on how much people donate (top tier being $30.) Unlike most of these deals, this Bundle started at 5 games and is in the process of adding 31 more, one for each of the days of December -- kind of like a pay-what-you-want video game advent calendar.