Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
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.
Liberapay is a non-profit organisation subscription payment platform.
Lightbox is small javascript library used to overlay images on top of the current page.
Modernizr is a JavaScript library that detects the features available in a user's browser.
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.