Sterlingcoin have released their SLG Online Wallet System a few days ago. Some of the features included in the Sterlingcoin online wallet ar sending and receiving of coins, but also a market overview. More features have been announced too!
The Sterlingcoin online wallet is based on Sterlingcoin API, and works just like a regular desktop client wallet, except for staking functionality which is not yet supported at this point in time. A Bittrex SLG/BTC market overview is also enabled in the SLG online wallet.