Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
Drupal is a free and open-source web content management framework.
Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
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.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.
Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.