Guitar Dashboard - Open-source interactive music theory for guitarists.
Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.
UltimateGuitar.com - Learn how to play your favourite songs on guitar or ukulele
Metronomus - Powerful and beautiful online metronome
Tabs Lite - An ad-free open source guitar tablature application using an existing popular tabs database. Built for speed and simplicity.
LINGOT - Musical instrument tuner, LINGOT is a musical instrument tuner.