The Ultimate Productivity Stack - Curated directory of tools to supercharge your productivity
LINGOT - Musical instrument tuner, LINGOT is a musical instrument tuner.
Productivity.so - Shortcuts and hacks for your favorite tools
Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.
Command Line Productivity - A Pomodoro meets GTD productivity pack for Alfred
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.