Salad

From CryptoWiki

Basics

"Prototype of an Ethereum coin-mixer built on Enigma.

Speaking of which, here's yet another approach to transactional privacy on Ethereum, built on L2 Enigma network. 

The post goes into some degree of details, however the key differences here with traditional ZKP mixers are Salad requires ~1/7 gas cost and provides a non-interactive UX (ie you don't have to interact with the contract both during deposit and withdrawal but only once)."