A Coca-Cola machine accepting Bitcoin via the Lightning Network.
This project makes a simple, cheap and secure payment system using RFID that is suitable for small businesses.
(First?) Libra Watch & Hardware wallet. Built on M5SickC devices using KULAP libra services.
Can your Raspberry Pi do anything the general public would pay money for? TRIGGERcmd's paywall feature just needs a Paypal button ID.
Rebuilding the game, so you can waste IOTA coins too.
KhadashPay is an easy-to-use DIY payment system
