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.
Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.
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
Metronomus - Powerful and beautiful online metronome
Flattr - Help the open and free web flourish. Support creators by paying for their free content.
LINGOT - Musical instrument tuner, LINGOT is a musical instrument tuner.