Novacoin is a hybrid Proof of work (POW) / Proof of stake (POS) decentralized peer-to-peer cryptocurrency.The Proof of Work part of Novacoin is based on the Scrypt hashing algorithm. Proof of Stake contributes to the coins energy efficiency, as there is no need for nodes to contribute mining power to part of the money creation process. As of now, Novacoin is set to be capped at 2 billion coins. However Novacoin stated that the cap limit may be lifted if the situation requires it. It looks very much like a variation of Sunny King Peercoin.
Digitex Futures is a commission-free cryptocurrency futures exchange with a rapid-fire one-click trading ladder and high leverage. Traders can buy and sell perpetual swap futures contracts on Bitcoin against the US Dollar and pay no transaction fees on any trades. The company will be adding extra markets such as Ethereum and Litecoin soon after the mainnet launch on April 27. Commission-free trading is made possible by using its own cryptocurrency, called the DGTX token, as the native currency of the futures exchange. Instead of covering costs by charging transaction fees on trades, Digitex meets the operational costs of running the futures exchange by creating and selling a small number of new DGTX tokens each year.