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.
Airbloc Protocol redefines how data is collected, monetized and utilized. Leveraging blockchain technology and token economics, it seeks to facilitate more transparent data flows between data owners, data providers and data consumers. Ultimately, it aims to return data ownership back to data owners, provide applications with tools to collect and monetize data legitimately, and allow data consumers to purchase explicitly consented data with an auditable source of provenance for their business intelligence, research, and targeted marketing purposes.