Modernizr is a JavaScript library that detects the features available in a user's browser.
RackCache is a quick drop-in component to enable HTTP caching for Rack-based applications.
Ruby on Rails is a server-side web application framework written in Ruby under the MIT License.
Ruby is an open-source object-oriented programming language.
WEBrick is a lightweight HTTP server library in Ruby, included in the standard library, primarily used for local development and testing of Ruby web applications.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.