Miner Maniac is multi-currency mining pool. currently, you can mine Bitcoin Private, BitcoinZ, Zcash, ZenCash VoteCoin and SnowGem with a PROP Reward System and 0.5% fees.
Although NiceHash is usually regarded as a mining service, it's better to say that it's a kind of a platform for selling/buying cloud mining contracts. What is special about NiceHash is that users can opt for both selling and buying the hash power on this platform.
Pangolin Miner is a mining hardware provider and shareholder of Whatsminer Company. They offer the WhatsMiner M3, a proficient alternative to other Bitcoin ASIC miners. All hardware is fully packed, tracked and will need the customer signature proof. Thus ensuring all products find their way to the customer.
FlyHodler is a cloud mining services provider. With HODL contracts, the users can withdraw all its initial investment, plus mining income. It works as a bank deposit, so the users can top-up and withdraw their deposits, and their hashrate changes accordingly.