beaTunes is an iTunes companion app capable of automatically analyzing your music collection to help you build better playlists. It analyzes BPM (beats per minute), silence at the beginning or end of a song, and the color (based on frequency spectrum) of a given song. Some of the data is stored through iTunes, and some is stored by beaTunes itself. Additionally, beaTunes can suggest albums that would complement your music collection, display music charts and help you correct typos, wrong genres etc. It also allows you to blog about selected songs or playlists.

Here are some more examples of what you can do with beaTunes:
1. Automatically determine BPM (beats per minute) and store the result in iTunes
2. Manually determine BPM and store the result in iTunes
3. Inspect and fix your music library (typos, wrong genre etc.)
4. Sort existing playlists so that matching songs succeed each other
5. Create matchlists, i.e. playlists based on one or more sample songs
6. Browse songs from your music collection that match the currently selected song
7. Discover albums that aren't in your music collection, but would complement it
8. Keep up to date through Amazon? album charts
9. Automatically set start and end times of songs based on their volume
10. Categorize songs by their sound color
11. Build playlists per drag and drop
12. Create blog entries on blogger.com with your favorite playlist or songs
13. Add del.icio.us like tags to your songs
14. Look up track metadata using acoustic fingerprints
15. Detect the language of lyrics already stored in iTunes

The license of this software is Free Trial Software, the price is $34.95, you can free download and get a free trial.