Spotify is a freemium music streaming service providing digital rights management-restricted content from record labels including Sony, EMI, Warner Music Group and Universal.
Last.fm is a music community website that offers personalized internet radio, using a recommendation system called "Audioscrobbler" to build a detailed profile of users based on their music tastes and interests.
Deezer is a global music-streaming platform made for multiple of devices. With many contracts with big record labels, deezer allows users to listen to over 90 million songs.
Pandora Radio is a free (ad-supported) internet radio founded in 2000. Using the Music Genome Project, over 400 attributes of songs are analyzed in order to personalize radio stations from music you like.
Discogs is a crowdsourced music database and marketplace. Discover music, buy and sell music with collectors in the Marketplace in all physical formats.
Libre.fm is a project to help you keep track of what music you like and share that, with your friends, discover new music, and meet new people who share your taste in music.
Free internet radio, just like Pandora only fewer ads and more variety. Listen to hundreds of genre stations or create your own with your favorite music.
Tomahawk gives you to access to all of your favorite music in one powerful media player. Seamlessly jump from playing a song off your local machine, to one streaming from your other machines, to a recommendation from Spotify, to a pre-release on SoundCloud to your favorite...
The project is no longer maintained. Last version, 0.8.4, released in April 2015, can be still downloaded from the official website.
Amazon.com's online music store and music locker.