Stripe Terminal - The programmable point-of-sale solution 💳🛠️
bttn - Press the bttn & Magic Happens™ (internet connected button).
Square Register - A fully integrated point of sale (POS) system 💰
flic - Bluetooth Button - Control you smartphone with this wireless button!
RoyalPOS - Point of sale system for restaurants & retail stores
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.