Apache HTTP Server, colloquially called Apache, is the world's most used web server software.

lighttpd (lighty) is an open-source web server optimized for speed-critical environments while remaining standards-compliant, secure and flexible.

Hiawatha is an advanced and secure web server for Unix.

Mongoose is an embedded web server.

Nginx is a web server, which can also be used as a reverse proxy, load balancer and HTTP cache.

Cherokee is an innovative, feature rich, lightning fast and easy to configure open source web server designed for the next generation of highly concurrent sec…

Caddy is an HTTP/2 web server with automatic HTTPS.