TuneCrack - TuneCrack stands for: Crack the tuning problem. The importance of tuning is often underestimated.

Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.

PitchPerfect - PitchPerfect is a free guitar tuner that is developed by NCH Software. It combines automatic note detection with a user-friendly interface to provide accurate tuning for a variety of six-string instruments.

Metronomus - Powerful and beautiful online metronome

Semitone - Tuner, metronome, and piano for Android.

LINGOT - Musical instrument tuner, LINGOT is a musical instrument tuner.