Pundi X (NPXS) is the utility token of the eponymous platform and based on the Ethereum protocol. The cryptocurrency pairs including NPXS are listed on multiple exchanges.
Zcash (ZEC) is a cryptocurrency with strong cryptography that is supposed to provide high security and privacy. At some point, Zcash was endorsed by Edward Snowden and Roger Ver. Zcash is a Bitcoin fork and it exists since 2016. The mechanism providing privacy is called zero-knowledge proofs (or zk-SNARKS).
NavCoin (NAV) anonymous cryptocurrency operates on its own blockchain and serves as the coin of the NavCoin digital payment platform launched in 2014. It is currently represented on a few exchanges.