Some great projects have been mentionned already:

I would also confirm the following 4 names for high potential coins:

ESP (as soon as it delivers a bit AND start being present on big exchanges)
BAY: i still don't get why this coin is not top 20 already. Needs more communication maybe (overshadowed by bigger players)
XVG (maybe only 10x)
Signatum: grest support from the miners. A "true" coin. (But needs to be on more exchanges for liquidity)



I would add as well:
Darcrus (DAR): awesome project. Already on bittrex (big exchanges are catalysts)
RLC : a competitor to XEL and Golem, with a fantastic team, and again already on bittrex (ready to moon). Supercomputing is the new hype and this coin should pump soon.



Note: Be careful with ESP. Do NOT trade in Yobit (fake clone coin).