Blockchain
https://andersbrownworth.com/blockchain/hash
https://andersbrownworth.com/blockchain/
Private Permissioned Blockchains
Hyperleger (LinuxFoundation, IBM, Intel)
Node.js, Golang, Java
Corda (R3)
Supports Kotlin, which runs on JVM.
Quatum (JP Morgan)
It is an enterprise version of Ethereum. If you know about Ethereum and Solidity, you are almost ready to use Quorum.