Apache is a free and open-source cross-platform web server software.
Drupal is a free and open-source web content management framework.
GetResponse is an email marketing app that allows you to create a mailing list and capture data onto it.
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.
OWL Carousel is an enabled jQuery plugin that lets you create responsive carousel sliders.