The .ZPL file extension belongs to playlists created with Zune. Zune is a Microsoft ecosystem for multimedia delivery and management across a number of devices which includes Windows Phones, XBox, PCs and Zune Player. ZunePass lets users listen to music on demand through a subscription which can be paid for monthly or yearly. Zune also offers the option to rent or buy movies and TV shows.
Production of the hardware version of Zune Player ended in 2011, with Windows Phone largely replacing these devices.