Deno

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.

Kestrel is a cross-platform web server for ASP.NET Core. It's lightweight, fast, and can be used as a standalone server or in conjunction with other web servers.

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

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.

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.