AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
Apache is a free and open-source cross-platform web server software.
D3 based reusable chart library
Drupal Multisite enables separate, independent sites to be served from a single codebase.
Drupal is a free and open-source web content management framework.
PHP is a general-purpose scripting language used for web development.
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.