There are plenty!!! ... but all of them are scams.

On a serious note, for BCH, I remember about the wallet "Cashshuffle" but I can't comment about it.
I'vee seen mixers as a web-based service but they're gone (privcoin, weimixer,...) or decided to stop their service and instead create a BTC mixer
(exemple)

As for ETH, there are certainely smart contract mixers