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.
Coinmine is a ETH, ZEC, DASH, GRS, EXP, DCR, PPC, QRK, SRC, WDC, ZCL for a 1.5%, except for ETH, DASH, EXP and DCR which has a 1% fee. Coinmine uses a Prop payment system.
HydroMiner is a cryptocurrency mining company using green energy drawn from hydro power stations in the Alpine region of Europe. Hydro-power is generally thought to be one of the most effective and lowest-cost renewable energy resources. It is environmentally friendly, carbon-neutral and natural.