DeepOnion
DeepOnion is natively integrated with the TOR network and ALL connections are made over the TOR network. Recently, it also supports Obfs4 (protocol on top of the tor network, allows access to tor in the regions that tor is not allowed or banned). Nice DeepVault feature - allows adding file validation credentials(hashes) to the blockchain, can be used to verify a file integrity. More privacy features coming. Good marketing.
DeepOnion recently realized a new feature - "Stealth Address". It's another security layer, which allows receiving $ONIONS without compromising your real address.
Also, I think it won't be superfluous to mention the upcoming features. VoteCentral will provide something like "anonymous democracy", and of course DeepSend which will provide the highest level of anonymity.