ZAP by Jit.io is a popular free security tool used to run dynamic tests against web applications and APIs to identify vulnerabilities. It is actively maintained by a dedicated international team of volunteers. ZAP efficiently checks applications against a list of known vulnerabilities and identifies security weaknesses. It is included in the ISO-27001 A.12.6.1 standard for managing information security. ZAP is integrated into Jit.io's platform to provide continuous security by enabling teams to find and fix vulnerabilities in pull requests without slowing them down or requiring them to be security experts.