My Twitch channel: https://twitch.tv/boredhacker
http://forensicswiki.org/wiki/Main_Page
https://www.offensive-security.com/metasploit-unleashed/
http://www.pentest-standard.org/index.php/Main_Page
http://www.social-engineer.org/
https://www.reddit.com/r/netsec
https://www.reddit.com/r/malware
https://www.reddit.com/r/ReverseEngineering