Apache HTTP Server

The Apache HTTP Server Project is a collaborative software development effort aimed at creating a robust, commercial-grade, featureful, and freely-available source code implementation of an HTTP (Web)...
Language(s): C, XML
Operating system(s): Unix, Linux, Windows
License: Apache License 2.0

Nginx

Nginx is a web server which can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache. The software was created by Igor Sysoev and first publicly released in 2004. A company of the...
Language(s): C
Operating system(s): BSD variants, HP-UX, IBM AIX, Linux, macOS, Solaris, Windows, and other Unix/Linux flavors.
License: 2-clause BSD