Hack The Box - An online platform to test and advance your skills in penetration testing and cyber security.
HackerOne - HackerOne provides a platform designed to streamline vulnerability coordination and bug bounty program by enlisting hackers.
VulnHub - VulnHub provides materials allowing anyone to gain practical hands-on experience with digital security, computer applications and network administration tasks.
Intruder - Intruder is a security monitoring platform for internet-facing systems.
TryHackMe - TryHackMe is an online platform for learning and teaching cyber security, all through your browser.
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.