http://feathercoin.com/ was launched last Friday (Aug 27th) which is also SHA-256.
trixter lists the following as SHA-256 coins in a thread on the BFL forums:
Bitcoin
PPCoin
Namecoin
Terracoin
Devcoin
Freicoin
Ixcoin
Also i0coin, Zetacoin and Bytecoin use SHA-256.
(as new coins pop up all the time while others die, this list may be incomplete)