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Really, there are so many. Factom and Tezos (its ICO is next month) have some big VC backers. XEM (NEM) has a lot of traction, especially in Asia. Digibyte also has a big following, and may be working with the developers of Minecraft for game currencies. My advice would be to look at the coins' market caps and work your way down the list.

Coin Marketplace

STEEM 0.18
TRX 0.16
JST 0.029
BTC 79169.45
ETH 3182.99
USDT 1.00
SBD 2.63