Servers

Web server extensions

14 technologies: what each one does, whether it is SaaS or open source, its price range and its website.
  • OpenSSL

    62.3K sites

    OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.

  • Google PageSpeed

    24.2K sites

    Google PageSpeed is a family of tools designed to help websites performance optimisations.

  • Engintron

    5.4K sites

    Engintron is a plugin that integrates Nginx to cPanel/WHM server.

  • mod_jk

    2.4K sites

    Mod_jk is an Apache module used to connect the Tomcat servlet container with web servers such as Apache, iPlanet, Sun ONE (formerly Netscape) and even IIS using the Apache JServ Protocol. A web server waits for client HTTP requests.

  • mod_perl

    2K sites

    Mod_perl is an optional module for the Apache HTTP server. It embeds a Perl interpreter into the Apache server. In addition to allowing Apache modules to be written in the Perl programming language, it allows the Apache web server to be dynamically configured by Perl programs.

  • mod_ssl

    1.8K sites

    mod_ssl is an optional module for the Apache HTTP Server. It provides strong cryptography for the Apache web server via the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) cryptographic protocols by the help of the open-source SSL/TLS toolkit OpenSSL.

  • mod_wsgi

    1.2K sites

    mod_wsgi is an Apache HTTP Server module that provides a WSGI compliant interface for hosting Python based web applications under Apache.

  • mod_dav

    716 sites

    Mod_dav is an Apache module to provide WebDAV capabilities for your Apache web server. It is an open-source module, provided under an Apache-style license.

  • mod_fastcgi

    379 sites

    Mod_fcgid is a high performance alternative to mod_cgi or mod_cgid, which starts a sufficient number instances of the CGI program to handle concurrent requests, and these programs remain running to handle further incoming requests.

  • mod_python

    241 sites

    Mod_python is an Apache HTTP Server module that integrates the Python programming language with the server. It is intended to provide a Python language binding for the Apache HTTP Server.

  • Shelf

    145 sitesOpen source

    Shelf is a server framework for Dart.

  • mod_rack

    88 sites

    Mod_rack is a free web server and application server with support for Ruby, Python and Node.js.

  • mod_rails

    88 sites

    Mod_rails is a free web server and application server with support for Ruby, Python and Node.js.

  • mod_auth_pam

    11 sites

    Mod_auth_pam is used to configure ways for authenticating users.

Data from the open Wappalyzer database (enthec/webappanalyzer, GPL-3.0), updated every week. Site counts from the HTTP Archive (September 2026). Code tools (frameworks, build, ORMs…) come from a list kept by Faundr.