GoChain is a scalable, high performance, low cost, and decentralized cryptocurrency and blockchain that supports smart contracts and distributed applications. GoChain promises to deliver 100 times the speed of the Ethereum network, and acts a better alternative to smart contracts by using Proof-of-Reputation as a consensus mechanism rather than Proof-of-Work or Proof of Authority. Check out CoinBureau for the complete review of GoChain.
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.