Spotify is a commercial 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.
Google Play Music, a service available for people who have a Google account, lets people upload their personal music collection and access it instantly on the web or any compatible device.
Deezer is an Internet-based music streaming service. It allows users to listen to music content from record labels including EMI, Sony, Universal Music Group, and Warner Music Group on various devices online or offline.
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.