Apache is a free and open-source cross-platform web server software.
DoubleClick Ad Exchange is a real-time marketplace to buy and sell display advertising space.
Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
Phusion Passenger is a free web server and application server with support for Ruby, Python and Node.js.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.