Hack The Box - An online platform to test and advance your skills in penetration testing and cyber security.
VulnHub - VulnHub provides materials allowing anyone to gain practical hands-on experience with digital security, computer applications and network administration tasks.
TryHackMe - TryHackMe is an online platform for learning and teaching cyber security, all through your browser.
Hackbox - Hackbox is an open-source, container-based platform that makes it easy to launch vulnerable systems to test your hacking skill!
PentesterLab - Learn all about web hacking through online courses spanning the basics to advanced vulnerabilities
PwnTillDawn Online Battlefield - PwnTillDawn Online Battlefield is an online platform that allows you to learn and improve your pentesting and other cybersecurity assessments skills.