Hyperledger Sawtooth is an open-source enterprise blockchain-as-a-service platform that can run customized smart contracts without the need to know the underlying structure of the underlying system.
IOTA is a distributed ledger designed to process transactions between connected devices in the IoT ecosystem, and its cryptocurrency is known as MIOTA.
Lightning Network is a technological solution designed to solve the problem of transaction speed in the Bitcoin blockchain by introducing off-chain transactions.