Amazon Cloud Player
A streaming music player and cloud storage system that also ties in nicely with the Amazon Kindle Fire.
Deezer Deezer is a streaming music service that allows both listening and download capabilities. It also includes streaming radio.
eMusic eMusic is a music download store that sells MP3 downloads for a monthly subscription.
iTunes A music store and music library for your songs, combined with a music player and cloud storage system.
Last.fm Last.fm is a music discovery site and streaming music site, it also has the famous Last.fm scrobbler as well as streaming internet radio.
MOG A streaming music service with both radio and on-demand capabilities.
Pandora Radio Streaming Internet radio with customized channels.
Rdio A streaming music service with both radio and on-demand capabilities.
Rhapsody A streaming music service with both radio and on-demand capabilities.
Slacker Radio Slacker Radio is an Internet streaming radio service with customized stations as well as dedicated news and music stations.
Soundcloud Soundcloud is a streaming music site that is to audio what YouTube is to video.
Spotify A streaming music service with both radio and on-demand capabilities, as well as your own music library, plus the Spotify apps capability to build custom apps.
Turntable.fm Turntable FM is a cocktail of streaming music service, social media and video games, all rolled in one.
iTunes in the Cloud, Amazon Cloud Drive and Google Play offer music streaming services that store your music library in the cloud for you, so that you can access it from all of your devices.
Streaming Music Services
Spotify, MOG, Rdio and Rhapsody all offer you streaming music services based on free or subscription services; giving you access to libraries of music to listen to songs, albums, playlists and streaming radio.
Streaming Radio
Pandora, Spotify, MOG and Rdio offer Internet streaming radio, which allows you to listen to a flow of continuous songs from custom channels chosen by the user or specialty channels.