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EvenCoin (EVN) was released in 2017. It is self-mined with parallel to Ethereum even number of blocks. Therefore, you’d need no hardware or energy to mine EvenCoin smart contract. Its maximum supply is 100 mln coins.
Polkadot development is on track to deliver a robust platform for security, scalability, and innovation.
Ren is an open protocol meant to enable the permissionless and private transfer of value between any blockchain. Ren's core product, RenVM, is focused on bringing interoperability to decentralized finance (DeFi).