MusicBee allows scrobbling with Last.fm.

MusicBee can be skinned which can significantly change the appearance of a player.
To apply a skin, it must first be downloaded, moved to the appropriate folder, and after restarting MusicBee, it can be applied. A collection of skins can be found here. It's also possible to customize the layout by choosing which panels to display.

MusicBee can automatically identify songs based on their sound signature and use that information to pull metadata about the song (such as tags, artwork, and lyrics).

A collection of plugins can be found here. These plugins extend the uses of the app from iOS support, last.fm support, to streaming services support.

MusicBee offers a very straight-forward and easy-to-use interface.

A version of MusicBee can be used without having to be installed. It can be kept on an external device and run from that.

Easy to sync playlists of files or whole library to moist phones and players.