So far, I like bTunes the best for local music (I got it from Aptoide - I couldn't find it anywhere else). I use OGG Vorbis and large Album Art and so far that app works well in both areas - very simplistic interface but gets the job done. RealPlayer Beta I used more for video, but I still haven't decided on a default video player yet. As for online music, Pandora is pretty much the standard so that's self-explanatory - my only issue right now is that the device goes to sleep at points while playing.