- Cybrary - Free courses in ethical hacking and advanced penetration testing. Advanced penetration testing courses are based on the book 'Penetration Testing for Highly Secured Environments'.
- Coursera - 100% online learning from the world’s best universities and companies.
- Udemy - Choose from over 100,000 online video courses with new additions published every month.
- edX - Accelerate your future. Learn anytime, anywhere.
- MOOC.fi - The courses are offered by University of Helsinki's Department of Computer Science.
- Linux Academy - Stay ahead of the curve with the latest hands-on Linux & cloud training.
- Microsoft Academy - Microsoft Professional Program for Cybersecurity.
- SANS Cyber Aces - SANS Cyber Aces Online is an online course that teaches the core concepts needed to assess, and protect information security systems.
- Offensive Security Training - Training from BackTrack/Kali developers.
- SANS Security Training - Computer Security Training & Certification.
- Pentester Academy - Learn Pentesting Online.
- Open Security Training - Training material for computer security classes.
- ICS-CERT VLP - ICS-CERT Virtual Learning Portal (VLP).
- Juniper - Juniper Networks Training Courses.
- Cisco Networkin Academy - Cisco Networkin Academy.
- Future Learn - Introduction to Cyber Security.
- Khan Academy - A free, world-class education to anyone, anywhere.
- Heimdal Security - Cyber Security Course for Beginners.
- CTF Field Guide - Everything you need to win your next CTF competition.
- ARIZONA CYBER WARFARE RANGE - 24x7 live fire exercises for beginners through real world operations; capability for upward progression into the real world of cyber warfare.
- European Union Agency for Network and Information Security - ENISA Cyber Security Training material.