Most of these are technical in nature, but great to see overall.
https://www.youtube.com/watch?v=t-bjhu2z9wE
http://tldp.org/LDP/Bash-Beginners-Guide/html/
http://www.bleepingcomputer.com/
https://www.youtube.com/watch?v=GLO9HGDwOY0
http://skilldrick.github.io/easy6502/#snake
https://www.ethicalhacker.net/forums/viewtopic.php?f=90&t=11757#p62170
https://members.elearnsecurity.com/
http://proactivedefender.blogspot.com/2012/06/esxi-security-lab.html
http://www.fuzzysecurity.com/tutorials.html
http://www.fuzzysecurity.com/tutorials/16.html
https://howsecureismypassword.net/
http://www.smallnetbuilder.com/wireless/wireless-howto/31914-how-to-crack-wpa-wpa2-2012?start=2
https://community.rapid7.com/docs/DOC-2196
http://kaoticcreations.blogspot.com/2011/08/automated-lfirfi-scanning-exploiting.html
https://evilzone.org/tutorials/local-file-inclusion-(lfi)/
http://www.offensive-security.com/metasploit-unleashed/Main_Page
https://www.microsoft.com/en-gb/security/pc-security/password-checker.aspx
http://www.0daysecurity.com/penetration-testing/enumeration.html
http://www.enigmagroup.org/exploits
https://myoscp.wordpress.com/2013/05/28/preparation-to-my-oscp/
http://www.pentest-standard.org/index.php/PTES_Technical_Guidelines
http://blog.netinfiltration.com/2013/12/03/setting-up-a-pentest-lab-for-beginners/
http://www.projectshellcode.com/?q=node/12
http://docs.python.org/2/tutorial/
https://www.virustotal.com/en/
https://www.exploit-db.com/papers/12902/
http://opensecuritytraining.info/Welcome.html