Bitminter
Bitminter is a Bitcoin mining pool that aims to make it easy for anyone to make bitcoins. Bitminter has it's own custom miner with a clear graphical interface and can work with GPUs and external ASIC devices equally well.
Features of Bitminter client: Easy to use good-looking GUI Zero installation Supported ASICs: Butterfly Labs (except Monarch), Block Erupter USB (and other Icarus-compatible), Chili, Red/Blue Fury, Antminer U1/U2 Works on Windows, Linux and Mac OS X