May Hurray Indie Royale bundle may be good
Unlike A MAJOR PUBLISHER, the Indie Royale guys actually know what the word "indie" means. Their latest colon-tastic bundle includes Dungeon Defenders, Containment: The Zombie Puzzler, Data Jammers: FastForward, Brainpipe - A Plunge to Unhumanity and Weird Worlds: Return to Infinite Space. You also get a few extras: Dr. Blob's Organism, and the VooDoo Interface and Temporal Logic Grid Blues OSTs.
Games are provided in their Steam and Desura forms, apart from Weird Worlds which isn't on Steam, weirdly. The current price stands at £3.14, but you can pay more than £4.32 to get Starscream's album Future, Towards the Edge of Forever.