Here are a few coins I can recommend.
Franko - One of the oldest coins with a good and active development team.
Ultra Coin - A new coin with an algorithm which is different from BTC and LTC. It has got a good support from the community as well.
DigiByte - A new and promising coin with active developer and having a great support from the community.
Vertcoin - A new and promising coin. I think they were the first coin to introduce N-factor scrypt algorithm.