As @SmartOne suggested. It would be really cool to have a wiki with useful links. Simply edit this topic and away you go!
Blogs
News
- The Hacker News
- Security Affairs
- WIRED (Security Category)
- SANS Newsletter(s) (For NewsBites, you get to view opinions from the Editorial Board of SANS alongside the news)
Git repos
- Awesome-Hacking
- low level (Resources and articles for (but not limited to): reversing, security, …etc.)
- Math Symbols as Code (cheat-sheet for explaining different math symbols as code)
- Hacker Roadmap (overview of pentesting and helpful for beginners)
- Hacking Security Ebooks(Free Security E-books to Download)
- H4cker by The Art of Hacking
- Awesome Hacking Search Engines
Tutorials
- Cybrary - Online Free CyberSec Training
- OpenSecurityTraining (Similar to Cybrary)
- Crash Course - Computer Science Playlist [YT Channel]
- Computerphile [YT Channel]
- Hackers Arise
Misc
- Every book in existence - Where DMCA’s power doesn’t reach.
- Defcon Media Server - Contents of every defcon to date (include presentations’ videos)
- Security Resources: Beginner to advanced for all security folks!
- Wireless Passwords from Aiports & Lounges around the World
- Surveillance Self-Defense
- Free Programming Books
- Password Lists
- Free IT eBooks
- NIST Computer Security Resource Center - Special Publications
- DoX Format
- SmashTheStack fileserver - Contains a very good disassembly tutorial, and some other goodies
- Ansible vs Puppet vs Chef vs Salt vs Docker vs Vagrant
- A list of VPS hosts that accept Bitcoin
- FuzzySecurity - Contains a lot of tutorials and information about exploit development and low level security in general
- azeria-labs - Great content about shellcoding and reversing in ARM assembly