Deno

Apache Traffic Server is an open-source caching proxy server. It offers high-performance caching, proxying, and load balancing capabilities for web traffic management.

Centminmod is a shell script installer for quickly setting up a high-performance Nginx, PHP, MariaDB, and WordPress stack on CentOS systems.

Google Web Server (GWS) is Google's custom web server software. While not publicly available, it's optimized for Google's specific needs and high-traffic requirements.

LiteSpeed is a high-performance, lightweight web server designed for speed and scalability. It offers Apache compatibility while providing superior performance for high-traffic websites.

Caddy is a modern, Go-based web server known for its simplicity and automatic HTTPS features. It's designed to be easy to use and secure out of the box.