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.
Nginx configuration generator
Nginx Quick Reference (HN) - Notes describes how to improve Nginx performance, security and other important things.
Alphabetical index of nginx directives
Nginx source code
GIXY - Tool to analyze Nginx configuration. The main goal of Gixy is to prevent security misconfiguration and automate flaw detection.