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.
Metronomus - Powerful and beautiful online metronome
Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.
TempoPerfect Metronome - TempoPerfect is a free software metronome.
Open Metronome - Open Metronome, a Free Open Source Metronome for Windows Mobile and Pocket PC.
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.