iPad as the Teacher's Pet [Infographic] — Tony Vincent - Learning in Hand (Some of these sites we have used in tech classes.great for classroom!
30 iPad Apps for Music Teachers ~ Educational Technology and Mobile Learning. This one has some great, very usable apps.
25 Tempting Music Apps for the iPad
110 Free Music Education Apps - This website is Music With Mrs. She has organized 110 free music ed apps into different categories. Also check out the app called Aurasma and see what you can create.
Free iPad app-tivities for the Elementary Music Classroom - Presentation Software that's Simple, Beautiful, and Fun
Apogee’s MiC provides top-quality audio directly in to your iPad.
28 Free Music Toolkit Apps for Teachers - Great resource!
Tenuto - music theory and ear training app, best app that I have ever purchased!
Appealing Apps for Educators: Screencasting Smackdown – Videos in the Classroom - iPhone app article - Jennie Magiera
Chord Detector - Guitar, Ukulele, Banjo & Mandolin Chords on the App Store