Vocalist - Vocalist is an all-in-one music utility.
Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.
Singscope - See your pitch analyzed as you sing
Metronomus - Powerful and beautiful online metronome
Pitch-Chromatic Tuner - Tuner & Music Fitness Tracker
LINGOT - Musical instrument tuner, LINGOT is a musical instrument tuner.