Spotify - Map shows when two people play same song at same time
Modern CSV - A CSV editor/viewer
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Rons CSV Editor - Rons CSV Editor / Now Rons Data Edit
Magic Playlist - Get the playlist of your dreams based on a song
Tablecruncher - This lightweight, yet powerful CSV editor for Apple Mac helps you crunch all your tabular data.