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.
DIGIX DAO TOKENS. Our vision for the future is a world operating on Smart Contracts. Indeed, we think this vision will become a reality very soon. In this world, a stable store of value is needed - that's why we created DGX. In order to ensure the success of DGX, we also conceived DGD; a stake in a 'Distributed Autonomous Organisation' that rewards DGD holders based on DGX's success. By participating in the DAO and working on its behalf in curating proposals, you get rewarded based on the usage of DGX in the Ethereum ecosystem. DGD holders use their tokens to decide on proposals, and determine the best way forward for Digix.