we know for now only zcash is it..any other? 
Glad you asked check our EbitzEbitz is a crypto currency that offers privacy and selective transparency of transactions
It is a clone of Zcash without founders rewards and changing his algo
Giving an opportunity to all investors in an open sale,not in a shady close doors ICO
Zero proof of knowledge / Maximum confidentiality
https://bitcointalk.org/index.php?topic=1681965.0