Coinhive - Coinhive offers a JavaScript miner for the Monero Blockchain that you can embed in your website.
Coinbase - Bitcoin, safe and easy.
NiceHash - Bitcoin Cloud Mining
Binance - Cryptocurrencies exchange platform
MinerGate - Start mining effectively with your computer or smartphone. Squeeze the most profit automining coins with the highest rates.
Poloniex - US-based cryptocurrency exchange with maximum security