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.