Humble Indie Bundle 5 is the best one yet
Love indie games? I assume you’ve heard of Amnesia: The Dark Descent, Limbo, Swords and Sorcery EP, and Psychonauts. Alone they are great games, but together they form The Humble Indie Bundle V, like the Voltron of gaming! You can pay whatever you want, but paying more than $7.11 USD (at the time of writing) nets you Bastion. Adding another dollar to your donation earns you Steam keys in addition to your DRM-free downloads.
So essentially you’re paying around 1/9th of a full retail game for 5 fantastic indie games and you get to help charity. This is literally the best deal in gaming right now.
[Edit] Also check out this awesome trailer/commercial thing starring Tim Schafer.