thttpd

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

TwistedWeb is part of the Twisted framework, providing tools for building event-driven networking applications in Python. It's used for creating scalable web servers and services.

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.

A modern runtime for JavaScript and TypeScript.