DigitalNote is developing a privacy focused blockchain whose transactions will be resistant to analysis. The network will have a hybrid Proof-of-Work (PoW) and Proof-of-Stake (PoS) consensus mechanism and will be powered by the native XDN coin.

Hush is a cryptocurrency and messaging protocol that is focused on privacy. It uses a the equihash mining algorithm, which is a Proof-of-Work (PoW) consensus mechanism. It offers a high degree of privacy, and allows users to transact and send messages anonymously.
Hush is a fork of Zcash, and uses zk-SNARKS for zero-knowledge cryptography. Hush will allow developers to deploy Ethereum smart contracts on the Hush network.
The founders of Hush are closely associated with Komodo.

DASH, or digital cash, is a leading anonymity-centric digital currency that was created as a fork of the Bitcoin protocol. DASH allows users to make anonymous transactions instantly with very low fees.
DASH uses a lighter hashing algorithm (X11) and has a block time of 2.5 minutes. This significantly increases transaction time compared to bitcoin. It also introduced a system based on "Masternodes" and "Instasends" that provide incentives to users for securing the network and contributes to making transactions faster.
Users invest 1,000 DASH to host a Masternode, and then receive 45% of the reward for every block that is mined. DASH was designed with a decentralized governance model and a sustainable funding system that allocates a percentage of each block for network development purposes.
Although, Dash has not been able to attract as many developers and financial institutions as other cryptocurrencies, it is well positioned to continue growing and innovating.