SHA-256 ASICs will work for any SHA-256 algo altcoin.
Keep in mind the most recemt ASIC's have a tendency to choke on the low difficulties presented by most altcoins, running all possibilities of given hashes + nonces and sometimes crashing the miners.
Coins I know of with reasonable difficulties (>1M):
Aurora, Digibyte (SHA256), Unbreakable, Terra, Neos, Digital (SHA256), Maza, C-Bit, Join.
Keep in mind profitability for these altcoins fluctuate wildly, check out
www.zpool.ca.
Thanks for the info though. Was not sure, because there are really good miners released by some people and they are locked only for bitcoin mining.