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

MyGuitarTuner.com - Online microphone tuner for guitar, ukulele, violin and other instruments. Tune by ear or using the microphone of your device. It's fast and accurate algorithm makes it one of the best online microphone tuners available.

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.

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

Semitone - Tuner, metronome, and piano for Android.

Metronomus - Powerful and beautiful online metronome