MusicReader
With MusicReader PDF 4, you can carry your entire music library with you wherever you go. Find any piece instantly. Create playlists and customize effortless page turns. View music in a variety of formats: zoomed half page, full page, rotated portrait (for non-Mac supported graphics cards), and double page views. Annotate your music with digital ink in multiple colors non-destructively.
MusicReader PDF 4 works with all PDF files natively - no need to convert files. Mac and PC compatible, with an iPad version available separately.
MusicReader PDF 4 also comes with a full set of musicians' tools, including an audio recorder and player, digital metronome, and an audio/visual tuner.
Cost: Paid, Trial