Obyte

In contrast with most other decentralized databases, Byteball doesn't require PoS or PoW mining, has no blockchain, and does not have any blocks. A Byteball transaction hash is linked to a new one by signing the previous transaction's hash. Directed acyclic graphs (DAGs) are formed by these links between transactions. On this network, Bytes, the currency of Byteball, are used to pay transaction fees. In a transaction, value can be exchanged or any type of data can be stored.