Apache is a free and open-source cross-platform web server software.
Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Debian is a Linux software which is a free open-source software.
Modernizr is a JavaScript library that detects the features available in a user's browser.
Phusion Passenger is a free web server and application server with support for Ruby, Python and Node.js.