Perl is a family of two high-level, general-purpose, interpreted, dynamic programming languages.

PHP is a general-purpose scripting language used for web development.

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.

Apache is a free and open-source cross-platform web server software.

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.

Unix is a family of multitasking, multiuser computer operating systems.

Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.

jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.