Pool.Monero is a XMR mining pool. Users can mine Monero for a 0.1%, 0.2 of which is donated to the cryptocurrency and opensource pool developers. XMR uses the Prop payment system and the minimum payout is 0.1 XMR.
The Onion Pool is an Ether mining pool that currently charges no fee. It runs on a prop payment system and rewards miners with the block tx. fees as well. The minimum payout is 0.01 ETH.