Awesome Security Gists 
Explanation
- HowTo: Privacy & Security Conscious Browsing : Recommendations on how to browse in a privacy and security conscious manner
- Petya : Petya fact sheet
- WannaCry : WannaCry fact sheet
- WebSockets : An introduction to Web Sockets
Payloads
- XXE Payloads : Collection of XXE payloads
Pentest
- GitHub for Bug Bounty Hunters : Tips for finding security issues in GitHub projects
- Proposal: Node.js penetration test framework : Has a good collection of WebApp (NodeJS) pentesting tools in comments
Misc
- EQGroup : Curated list of links describing the leaked Equation Group tools for Windows
- GoogleHackMasterList.txt : The definitive super list for "Google Hacking"
- InfoSec Newbie : Collection of resources on how to start in InfoSec
- Most VPN Services are Terrible : Collection of terrible VPN services which are not recommended