Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.
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.
PitchBlitz - PitchBlitz prepares you for the Pitch Grid Test.
Metronomus - Powerful and beautiful online metronome
Guitar Tuna - GuitarTuna is the easiest, fastest and most accurate guitar tuner app out there!