MoneroMilk is a XMR mining pool. It has a 1.2% fee (of which 0.2% is donated to the Monero core dev team) and runs on a Prop distribution method. The payout is set at 0.35 XMR.
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.
Iron Vault offers a variety of straightforward turnkey solutions for individuals to partake in their own crypto-currency mining operations. Their products and services allow all types of individuals to safely operate their own mining hardware in one of their dedicated state-of-the-art data centers.
Cyberian Mine GmbH is a German-Russian joint venture cryptocurrency mining company. It provides mining hostage services for its clients with an electricity cost of €0.03/kWh, achieved by green hydro-power stations, with free natural cooling in Siberia’s low ambient temperature. At Cyberian Mine, the user can choose to buy a mining device from them directly or send its own mining device to perform the host mining service.