Apache is a free and open-source cross-platform web server software.
Gumroad is a self-publishing digital marketplace platform to sell digital services such as books, memberships, courses and other digital services.
RequireJS is a JavaScript library and file loader which manages the dependencies between JavaScript files and in modular programming.
SoundCloud widget gives you the ability to upload, manage and share tracks.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.