Nchan - Scalable, flexible pub/sub server for the modern web, built as a module for the Nginx web server.
HTTPS-PORTAL - Fully automated HTTPS server powered by Nginx, Let's Encrypt and Docker.
GIXY - Tool to analyze Nginx configuration. The main goal of Gixy is to prevent security misconfiguration and automate flaw detection.
Nginx Admin's Handbook - How to improve NGINX performance, security, and other important things.