BTC Guild is a Bitcoin Mining Pool, and one of the oldest remaining Bitcoin pools. BTC Guild tries to provide a simple but clean interface, full of all the statistics that a savvy miner would want to see.
BTC Guild offers two methods for miners to receive payments. Pay-per-Share (PPS) provides miners with the lowest variance of any pool payment system, at a 7.5% fee, and Pay-per-Last-N-Shares (PPLNS), at a 3% fee, which has some variance, but also includes block transaction fees.