Crypto based on zerocoin seems to be the most sophisticated anonymous currencies so far. As far as I know there are three coins based on zerocoin so far: Zcash , Zcoin and Zoin (they are on Since Zcash doesnt have an official GUI yet, I havent used it. But I tried Zcoin, however it seems really buggy, and I'm not sure I can recommend it.
Also, there are differences between Zcash and Zcoin - Zcash hides the amount sent, but Zcoin does not.

Don't know much about zcash, will have to look into it more.

ZCash! The anonymity of the transactions is in the design basis. It really fulfills its objective. The only problem is in the scalability of its performance.

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