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.
F2pool is a Chinese multicurrency mining pool founded in 2013. Now it has servers located in the USA, Canada, Russia, Singapore, and several other countries. The pool has a big number of supported coins. Currently, it is possible to mine around 40 currencies on F2pool.
Eken Cloud Mining is an easy, cheap, and good way to get or mine Bitcoin, Ethereum, Zcash, Dash or Monero. EKEN Cloud Mining was founded in 2016 in France where the office was set. With the mining operation in Canada, they provide daily payouts to the clients with a minimum amount of 0.0047 BTC and 0.12 ETH. Being a new and growing company there are still several details to improve, such as the website that will be updated next week.