Ethermine. Ethermine, the most popular Ethereum mining pool, allows for anonymous mining with a real time PPLNS payout scheme. The pool prides itself with instant payouts as soon as the payout threshold has been met (minimum 0.05 ETH). The pool has a 1% fee and pays out for block rewards and fees as well.
However, joining a pool is a much more profitable way to mine Bitcoin, especially since its difficulty increases with every coin awarded. To be competitive, it's best to join a pool unless you have the resources to create your own or buy multiple state-of-the-art ASIC miners.