Merge Mining Pool also known as mmpool is a BTC mining pool that allows users to mine BTC for a 1.5% fee and to merge mine with Namecoin, Ixcoin, Devcoin, I0coin, Groupcoin, Unobtanium and Syscoin 2.0.
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.
FlyMining is a Scotland-based cloud mining service provider where users can start mining for as low as $10. It features monthly and lifetime contracts, the latter of which will only become obsolete once they are not profitable for the user. Users can pay for electricity fees with EUR/USD, rather then paying them from the mining revenue, allowing them to hold on to the entirety of their mined BTC. FlyMining features publicly accessible webcams and also allows users to confirm that their bitcoins are "freshly" mined through the block explorer. Contracts can go from 0.1TH/s to 60TH/s.