Songr is a cloud music player that streams and downloads music from multiple web services, including Grooveshark, Prostopleer, MusicSearch, YouTube and many others (including the music already on your computer)
Download version 1 Download version 2
Windows XP/Vista/7/8, freeware, 5 MB

Songr 2 player

Songr 1

Note: Songr does not index nor host any mp3 files, it's just a desktop interface to third party mp3 search engines. Songr has no control over any web sites or resources which are provided by companies or persons other than Songr.