Seth is an ETH-focused CLI tool from DappHub whose development started in 2018. Seth is "Metamask for your command line", allowing users easily perform transaction generation, balance checking, and contract reading.    Developers can use Seth for anything they would be able to do with Metamask & Etherscan but instead use their command line.   Especially helpful is Seth's "command substitution" syntax, allowing a user to use the output of one command as parameter for another.