Shardus is building distributed ledger software to remedy the problems of traditional blockchains -- scalability, decentralization and efficiency. The technology being developed will use compute and state sharding to accommodate billions of daily active users, allowing for global-scale decentralized networks.
Neblio (NEBL) is a project that is developing an open source enterprise blockchain solution. This solution will be a secure and distributed platform upon which businesses can develop their own applications. Neblio is joining a long list of other projects such as Ethereum's Enterprise Ethereum Alliance (EEA), Hyperledger Fabric and R3 Corda that are working on similar enterprise blockchain development networks. Check out CoinBureau for the full review of Neblio project.