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.
Tera is a decentralized application platform. This is akin to an operating system. Tera consists of a repository of programs and data storage integrated into the Internet. The mechanism for publishing programs and data on this platform is free from censorship. The circulatory system is the blockchain.