ERCx: Token Test Library

Chimera is a framework to write Solidity tests in foundry and be able to reuse them with other Open Source Tools such as Echidna, Medusa, Halmos and Kontrol

Slither is Trail of Bits' Python static analysis engine for Solidity and Vyper: run it in CI to fire detectors, print structural views of contracts, or script custom checks over whole codebases.

Synpress layers Playwright with Ethereum-aware browser automation so you can end-to-end test dapps, including wallet popups and chain switches, in CI.

Aderyn is Cyfrin's open-source, Rust-based solidity smart contract static analyzer designed to help protocol engineers and security researchers find vulnerabilities in Solidity code bases

Medusa is a stateful smart contract fuzzer inspired by Echidna. It provides parallelized fuzz testing of smart contracts and the verification of advanced smart contract invariants.

Titanoboa is an interactive Vyper interpreter and test harness for fast feedback loops when you are experimenting with contracts outside a full Foundry loop.