BookCAT - BookCAT is a powerful book collector database program which will help you catalog a book collection...
Spotify - Map shows when two people play same song at same time
Music Collection - This Music Collection Software allows you to organize your music collection including CDs, MP3s or vinyl records into a fully searchable database.
SoundCloud - Enjoy music & follow favourite artists
Waf Music Manager - Waf Music Manager is a lightweight and fast application that helps to organize the local music collection, such as large music files, edit, video formats support, high resolution, and many 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