May be this list could cointains some obsoletes currencies but this is the list of SHA256 Coins:
2014 (MMXIV)
21Coin (21)
AsicCoin (ASC)
Battlecoin (BCX)
Benjamins (BEN)
Betacoin (BET)
Bitcoin (BTC)
BitcoinDark (BTCD)
Blakecoin (BLC)
BTCitcoin( )
Burstcoin (BURST)
Bytecoin (BTE)
Continuumcoin (CTM)
Deutsche eMark (DEM)
Devcoin (DVC)
Digibyte (DGB)
eMark( )
Emercoin (EMC)
FastcoinSha (FSS)
FireFlycoin (FFC)
Fuelcoin (FUEL)
Freicoin (FRC)
Globe (GLB)
I0coin (I0C)
Ixcoin (IXC)
Joulecoin (XJO)
MazaCoin (MZC)
Myriadcoin (MYR)
Namecoin (NMC)
Neoscoin (NEOS)
Nxt (NXT)
Omni (MSC)
Opensourcecoin (OSC)
Peercoin (PPC)
PetroDollar (P$)
Pay-Pro (PRO)
Platinum Coin (PT)
PremineCoin (PMC)
Reikicoin (RKT)
Saffroncoin (SFR)
Savecoin (SPC)
Snowcoin (SNC)
TakCoin ( )
Takeicoin (TAK)
Teacoin (TEA)
TEKcoin (TEK)
Terracoin (TRC)
Tigercoin (TGC)
Titcoin (TIT)
Unattanium (UNAT)
Unbreakablecoin (UNB)
Unicoin (UNIC)
Unobtanium (UNO)
Wankcoin (WKC)
Zetacoin (ZET)