Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
Anchor CMS - Free and lightweight blogging system
Deezer - Deezer is a music streaming app created in France. It is available in 180 counties and gets 16 million users a month. 6 million of the users have paid subscriptions. Read more about Deezer.
Textpattern - Textpattern is an elegant content management system that is free, open source software.