Yes, Zerocoin, Zerocash, ZCash ... good foundation.
http://zerocoin.org/

Zcash (ZEC) price is $38. Librexcoin (LXC) may have price up $2.
https://coinmarketcap.com/currencies/zcash/

Website Librexcoin:
http://librexcoin.bpw-serwis.com.pl/