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.
Prototype is a JavaScript Framework that aims to ease development of web applications.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.