Prime Pools are currently under BETA Testing. They have, for now, Electroneum (ETN) Pool in Active BETA Testing and more pools coming soon with a PPLNS system. With servers based on the U.S.A, they are improving the back-end of the Pools.
Update 22.12.2020: The pool is closed, the site is down.
Aurora Pool is an Ethereum mining pooll where users can mine Ether (ETH) with 0.7% fee and through a Prop payment system. Aurora's minimum payout is 0.05 ETH.