Vocalist - Vocalist is an all-in-one music utility.
Vanido - Vanido is a singing coach in your pockets.
TapNTune - TapNTune is a fully functional application that can help users tune their instruments with ease, and users can use it on their Mac system.
Listening Singing Teacher - Listening Singing Teacher helps you to sing in tune and in rhythm.
La-Vocal - Automate vocal exercises to practice easily & efficiently.
User Inyerface - A painful illustration of bad UX