PayPal - PayPal is the faster, safer way to pay online without sharing financial details, send and receive money or accept credit and debit cards as a seller
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.
Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
Metronomus - Powerful and beautiful online metronome
Braintree - An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.
LINGOT - Musical instrument tuner, LINGOT is a musical instrument tuner.