Update: HEAT is very close to launch. 24-48 hours.
Scalability: 1000 transactions per second to 100 000 TPS
Direct Crypto Trading - An Asset to Asset Exchange, with cryptocurreny gateway support, for decentralized p2p cryptocurrency trading.
Hybrid Block Rewards - Proof of Stake and Proof of Persistence (which involves saving files on the HD)
Offline Smart Vouchers - Fully signed transactions that can be sent to the blockchain by anyone.
...and much more
Check out the OP on bitcointalk: https://bitcointalk.org/index.php?topic=1543991.0
Company Website: http://heatledger.com