Aztec is an open source layer 2 network bringing scalability and privacy too Ethereum. Aztec uses zkSNARK proofs to provide privacy and scaling via our zkRollup service.
Railgun
Privacy
RAILGUN secures privacy for DEX trading and lending. Built without any bridge or layer-2, RAILGUN is a smart contract system that gives zk-SNARK privacy to any transaction or smart contract interaction on Ethereum.
Typhoon Cash
Privacy
A New Protocol for Yield-Capable Private Transactions.