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Titanoboa is a Vyper interpreter and testing framework that provides a modern, integrated development experience for Vyper smart contracts. It enables developers to test and debug Vyper contracts directly within Python, offering features like pretty tracebacks, forking, debugging capabilities, pytest integration and out-of-the box fuzzing. Beyond its standalone capabilities, Titanoboa serves as the foundation for other popular testing frameworks like Ape and Moccasin, and is a core piece of infrastructure for the Vyper ecosystem.

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 a Solidity and Vyper static analysis framework written in Python3. It runs a suite of vulnerability detectors, prints visual information about contract details, and provides an API to easily write custom analyses. Slither enables developers to find vulnerabilities, enhance their code comprehension, and quickly prototype custom analyses. Slither has been used for many years by both security engineers and developers to secure their smart contracts. By allowing developers to find the most common vulnerabilities on their smart contracts, Slither helps to improve the security of the Optimism ecosystem. Slither has 90+ detectors, and works on both Solidity and Vyper. In addition it provides printers, helping to review quickly features of contracts. It's python API can also be used to leverage its inbuilt analysis for custom needs. Slither can directly be run on a contract deployed on optimism, with slither optim:0x..ADDRESS