ICX, ADA & SONM!
These altcoins seem to me very promising ones but I would like to mention some more tokens. Probably, not so many people know about them. These are KuCoin, Gladius, Napoleon X, EIDOO, Credits, and Crypterium.
The projects of these altcoins conducted their ico more recently, so that the current price for them is not very high. But this is the moment to buy them. Take a closer look at them.