https://coinmarketcap.com/currencies/zcash/ (ZEC)
https://coinmarketcap.com/currencies/zcoin/ (XZC)
I know about ZCash that it is deflationary like Bitcoin, has a better privacy than Bitcoin (which is also riskier in a way since it may place a smaller, innocent trader or investor under suspicions by involving him in a bigger transaction and by this forcing an investigation upon that smaller trader/investor, which in the future may automatically involve IRS) and is Proof-of-Work, yet in a different way than Bitcoin.
What about ZCoin?
Are there other deflationary currencies with a better privacy policy than Bitcoin?