Apache is a free and open-source cross-platform web server software.
Joomla is a free and open-source content management system for publishing web content.
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.
UIKit is the framework used for developing iOS applications.
WhatsApp Business is a free to download app available on Android and iPhone using which businesses can connect with their customers.