Spotify is an application available for multiple platforms that allows you to browse and listen online music and radio stations.
The app is similar with iTunes, but it lets you to listen the entire songs and there are millions of them. The paid upgrade allows to synchronize your playlists across devices and download the audio files.
It includes a search feature, you can browse by genres, years, top lists and more. Also, you can search and listen online radio stations, without any setup from you.
Spotify is limited to certain countries.
Pro: Clean interface, good quality of audio. The music in just at one click away.
Cons: Is not available in all countries.
Spotify is available as free download for Windows 32-bit and 64-bit.