A curated list of free cybersecurity learning resources. If you have any further resources, feel free to open a pull request.

(Cert) = includes a certificate of completion

• ISC2 Certified in Cybersecurity (Cert) ISC2 is curently giving away 1 million courses and exams for their new Certified in Cybersecurity certification. (maintenance fees have to be paid)
• Certified Secure (Cert) offers courses about cybersecurity. You have to work through the basic levels to take the more advanced exams. But it is pretty quick and comes with badges.
• MICS - Introduction to Cybersecurity (Cert) Mossé provides an entry level certification for cybersecurity. The course is hands on, but submitting exercises is a bit annoying.

• TryHackMe (Cert) This website provides many hands on labs about different cybersecurity topics. They also have a lot of good courses combining theory and practice. Some more advanced courses may be paid only.
• Hack The Box (Cert) This website provides many hands on labs about different cybersecurity topics. They are not as guided as some of the TryHackMe courses, but have really good machines. Some more advanced courses may be paid only.
• VulnHUb They provide free to download vulnerable machines.

• APISec UNiversity (Cert) Free couses about API pentesting and security.
• Ethical Hacking Essentials (Cert) Fundamentals course about Ethical Hacking on EC-Councils Code Red.
• Android Bug Bounty Hunting like a rat (Cert) Fundamentals course about Android Pentesting and Bug Bounty Hunting on EC-Councils Code Red.

• Digital Forensics Essentials (Cert) Fundamentals course about DFIR on EC-Councils Code Red.
• Network Defense Essentials (Cert) Fundamentals course about Network Defense on EC-Councils Code Red.
• SANS Summits SANS hosts different summits throughout the year, many of them are only and free and you can check the replays here.

• SANS OSINT Summit Yearly free OSINT summit. The replays can be watched here.
• The Cyber Mentor OSINT course This OSINT course is provided by TCM for free on YouTube. It is a good place to get started.
• OSINT Mini - The CyberInstitute Short, free OSINT course covering some essentials.

• AttackIQ Academy (Cert) They provide free courses about MITRE ATT&CK, Purple Teaming and Breach SImulation. The courses have great production value and are full of knowledge.