Apple's FREE Music Memos app is more than just a simple audio memo recorder. It's a cool tool designed to inspire your songwriting too! Learn how to capture your ideas and begin your song production in this 16-tutorial course.
Capo by SuperMegaUltraGroovy (love that name!) is software that gives you the ability to reverse-engineer audio music tracks. Yes! It analyzes audio and tells you the tempo, chord structure and much more. Check it out!