Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust. Foundry consists of: - Forge: Build, test, fuzz, debug and deploy Solidity contracts, like Hardhat, Brownie, Ape. - Cast: A Swiss Army knife for interacting with EVM smart contracts, sending transactions and getting chain data. - Anvil: Fast local Ethereum development node, akin to Hardhat Network, Tenderly. - Chisel: Fast, utilitarian, and verbose Solidity REPL.