Zelcash is a cryptocurrency that holds a central role in the Zel Ecosystem. It gives the incentive for ZelNode ownership to enable the creation of ZelDex and the ZelDev Platform, enabling us to create a truly decentralized development platform.
ARPA is a Secure Computation Network Compatible With Blockchains They propose a blockchain-based secure computation network of Multi-party Computation (MPC). ARPA cryptographically enables private smart contract, unprecedented data-at-use privacy protection, as well as scalable computational sharding.