Magical Jelly Bean Keyfinder - The Magical Jelly Bean Keyfinder is a freeware utility that retrieves your Product Key (cd key) used to install windows from your registry. It also has a community- updated configuration file that retrieves product keys for many other applications.
Spotify - Map shows when two people play same song at same time
Product Key Explorer - Product Key Explorer is a key inventory and recovery software designed for Windows. It's meant to help users recover, find, and backup their activation keys for more than nine thousand popular software programs... read more.
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
ProduKey - Recover lost product key (CD-Key) of Microsoft Office 2003, Office 2007, Windows XP, Windows Server 2003/2008, Windows 7, and more.
SoundCloud - Enjoy music & follow favourite artists