Some time ago, my beloved Last.fm opened for public access its API . It means that now anyone (even you) can use the database of the most popular music service in the world.

Here is a partial list of what Last.fm can tell you:

• User Profile
• Tops of artists, albums and user tags for a specified period of time
• A list of recent listened, favorite, non-favorite tracks.
• List of friends and neighbors
• Events (your, friends, specified artists and recommended)
• Musical recommendations
• Tastemeter
• Information about the artist (albums, ratings, tags, events, similar artists, avid listeners)
• Album information
• Information about a specific track (tag cloud, similar tracks, avid listeners)
• Information about tags (rating, lists of artists albums and tracks)
• Group information (group ratings and recommendations)
• Top charts of individual countries
• Global Top Charts

Data is sent in XML, XSPF , RSS, iCal and Plain Text formats.

Some services I liked using Last.fm API.

LastGraph

Can create a poster in PDF or SVG format visually reflecting the dynamics of changes in your taste preferences for a week, year or whole life

Tuneglue

Visualization of the similarity of artists in the form of a graph
Personal tag cloud

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Compare two user tags

From this comparison, we can conclude that, unlike Kaaboom , I hardly listen to Post-rock , and she, unlike me, is Jazz . We must let her check out Erik Truffaz .

And the last ... Service calculates eclecticism of your musical preferences

PS This is copy-paste from my blog .