Apache httpd modules

Apache module that integrates Perl

open-source web server software

Apache HTTP Server module that integrates the Python programming language with the server

Apache module for Python based web applications

ModSecurity, sometimes called Modsec, is an open-source web application firewall (WAF). Originally designed as a module for the Apache HTTP Server, it has evolved to provide an array of Hypertext Transfer Protocol request and response filtering capabilities along with other security features across a number of different platforms including Apache HTTP Server, Microsoft IIS and Nginx. It is free software released under the Apache license 2.0.