Monero (XMR)
Litecoin (LTC)
Dogecoin (DOGE)
possibly NEOS.

Everything else isn't likely to make it big league.

Quarkcoin - dead.
Darkcoin - strictly for college doofuses who get scared/excited by the word dark and masturbate a lot.
Peercoin - dead although has good volume for minor trades.
Bytecoin - a joke.
Boolberry - lost its mojo and will be redundant after XMR wallet.
duckNote - rebranded to darkNote. Disaster. (see Darkcoin).