Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
Prototype is a JavaScript Framework that aims to ease development of web applications.
Ruby is an open-source object-oriented programming language.
SWFObject is an open-source JavaScript library used to embed Adobe Flash content onto web pages.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.