I am currently using This website and so far am very happy. 
It supports mining of:
minergate is a semi-scam, at the minimum they are stealing some of your hashrate. I would stay away. It supports mining of:
- Zcash
- Bitcoin Gold
- Ethereum
- Ethereum Classic
- Bitcoin
- Litecoin
- Bytecoin
- Monero
- DigitalNote
- Aeon coin
- FantomCoin
- QuazarCoin
- MonetaVerde
- Dashcoin
- Infinium-8
For beginners and those who have 1-2 GPU, best options:
1) minergate
2) micromining
3) kryptex
Of course if You have 6 or more GPU, then you need a more serious pool!