Bundle Stars' Adrenaline Bundle is one of the most impressive indie bundles I've ever seen, in that it contains 12 games of impressive quality... that you probably don't own already. From the excellent Ring Runner (an enormous twinstick space shooter/RPG fusion) and trippy Master Reboot to cathartic Rock Of Ages and the multiplayer madness of Gun Monkeys, there's a lot of game here for hardly any money whatsoever.
Specifically, you'll pay £3.59 for Bang Bang Racing, Etherlords II, Expeditions: Conquistador, Gun Monkeys, Heli Heroes, Kaptain Brawe: A Brawe New World, Master Reboot, Monday Night Combat, Postal, Ring Runner: Flight of the Sages & Rock of Ages.
A very generous haul indeed. Credit and thanks to jaystan @ HUKD!