gunicorn

Internet Information Services (IIS) is Microsoft's web server software for Windows. It's highly extensible and integrates well with other Microsoft technologies, making it popular in Windows-based environments.

Apache is a popular, free, and open-source cross-platform web server software. It's known for its flexibility, robustness, and extensive module support, making it suitable for a wide range of web hosting needs.

OpenResty is a web platform that extends Nginx with Lua scripting capabilities. It allows developers to create complex web applications and services directly within the web server environment.

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.

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.