Below are some start-ups or at least young companies in this cryptocurrency space that are trying to move beyond primary exchange functionality (simple order books) and/or hosted wallet services. Note: this is not an endorsement of them as an investment or service.
API: Chain, Blockr, HelloBlock, BlockCypher, HiBitcoin
Analytics: Coinalytics, Coinometrics
KYC: CoinTrust, Block Score, Coin Validation
Decentralized cloud: MaidSafe, StackMonkey, decloud, Bitcloud, StorJ
Hedging/lending: BTCJam, Bitreserve, Bitfinex
Platforms: SecondMarket (BIT), CampBX, TruCoin, Coinfloor, Atlas ATS, Kraken, Coinsetter, Vaurum, itBit, ICBIT, LedgerX