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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.
Golden Volunteer Organizer - Automated volunteer recruitment, management, and tracking
Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.
GoLocalBot. The project is closed - Platform for volunteers, NGOs, activists and crowdmapping.
LINGOT - Musical instrument tuner, LINGOT is a musical instrument tuner.
ClimateChoice - Learn how you can help prevent climate breakdown 🌎🔥