Equihash

• Mining algorithm used by ZCash, Horizen, Komodo, Pirate Chain, HUSH, Bitcoin Private, and Commercium and ZCoin (8-2019)
• On distribution (8-2019):

"As this chart shows, hash rate distribution is heavily skewed. In this case— that is, the case of the Equihash algorithm— the Zcash network is host to almost all of the Equihash hash rate. Approximately 90 percent of all existing hash rate for the Equihash algorithm is on the Zcash network.

It’s important to note that Komodo, Pirate Chain, and HUSH are all protected with the power of the Bitcoin network with the Delayed Proof of Work (dPoW) security mechanism. This prevents 51 percent attacks and keeps the networks secure, despite having comparatively small hash rates."