OWASP Security Shepherd
Security Shepherd is a computer based training application for web application security vulnerabilities. This project strives to herd the lost sheep of the technological world back to the safe and sound ways of secure practices. Security Shepherd can be deployed as a CTF (Capture the Flag) game or as an open floor educational server.
https://www.owasp.org/index.php/OWASP_Security_Shepherd
https://www.owasp.org/index.php/OWASP_Security_Shepherd