Are you looking for an alternative to Apple's latest iMusic and/or iTunes to organize, discover and sync your music with the cloud? 

Then check out Plex. Simply download Plex onto your computer or NAS (Network Attached Storage) device, and let it scan and index all your media, making it look beautiful and intuitively organized in your Plex library, and ready for streaming by CasaTunes.

Once Plex is installed, you will need to add the uPnP/DLNA music service to CasaTunes. Once added, your Plex music collection is automatically discovered and is ready to be played.

You add the uPnP/DLNA music service using CasaSetup > Music Services, or using the iOS App (Menu > Settings > Music Services > + Add music account).

If you are looking to store your music in the cloud or discover your music using audio fingerprinting, you will need to upgrade to Plex Premium.