The Ray Tracing in One Weekend series of books
Blackhat-Global-Lite OS Debian Buster based custom distro
deliberately vulnerable operating systems
Web and mobile application security awareness/training platform
msf post-exploitation auxiliary module
Vulnerable Virtual Machine to Learn
Python Based Brute Force Password Cracking Assistant By Clownsec
Penetration Testing Collection for crunchbang[Openbox(Debian)]
Matriux OS - Virtual Machine
Elemata is an open source content management system.
A really secure user authentication system in PHP and MySQL.
IT security resources for ethical hacking & penetration testing