What are some alternatives?
When comparing iTunes and Slacker Radio, you can also consider the following products
foobar2000 - An advanced freeware audio player for the Windows platform.
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.
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
Clementine - Clementine is a cross-platform free and open source music player and library organizer based on...
Serendipity by Spotify - Map shows when two people play same song at same time