Zclassic
Zclassic is a fork of Zcash released on November 6, 2016, just days after Zcash's own release. At launch, the only difference was no 20% miners fee for the Zcash founders, and no "slow start" for blocks. The coin kept the same characteristic parameters of Zcash, such as the fixed total supply of 21 million units, and uses non-interactive zero-knowledge proofs to keep transactions private. Zclassic has been developed in parallel with Zcash up to release 1.0.10-1.
Zclassic Forks
Zencash
Zencash is a fork of Zclassic that occurred on block 110,000 on May 23rd, 2017. Zencash introduced a communications layer to the protocol for private conversations and publishing. As of December 2017, Zencash has a market cap of $98 million USD.
Bitcoin Private
Bitcoin Private is a merge fork of Bitcoin and Zclassic scheduled for January 2018. Holders of either Bitcoin or Zclassic will receive Bitcoin Private coins. The fork aims to address privacy concerns associated with a blockchain with fully public transactions.