Bitcoin, Blockchain, Cryptocurrency, Iota, Raiden Network.
(http://www.tangleblog.com/what-is-iota-what-is-the-tangle/)— utilizes a non-blockchain solution called a Direct Acyclic Graph (DAG) otherwise known as the “Tangle.” Iota boasts fee-less, instantaneous transactions and is primarily geared for machine-to-machine payments. It is also quantum