MoneroHash is a US mining pool created solely for Monero mining. Since 2014 it is run by a single person. The fee is 1.6 and a part of this amount is given to open source developers. The payouts occur every 24 hour (in case if the threshold is reached). There's an option to send the mined coins straight to the exchange wallet. It saves users some money that could be spent on transaction fees.
P2pool is a decentralized peer-to-peer BTC mining pool, which means users can choose a private or public node to mine on. Fees depend on the node chosen by the miner and the transaction fees are shared. Unlike centralized mining pools, P2Pool is based on the same peer-2-peer (P2P) model as Bitcoin, making the pool as a whole highly resistant to malicious attacks, and preserving and protecting the decentralized nature of Bitcoin.
Mining Wholesale is a privately owned company based in The Netherlands, which focuses on the exploitation of mining-related products to consumers and businesses.