BCtip

BCtip.org is an open‑source Bitcoin tipping platform that was created as a way for individuals and merchants to send and redeem small BTC tips using printable “tip cards” and a URL-based redemption system. It originated in the Bitcoin community for facilitating micro‑payments and tipping, and has been described in coverage as a project that allowed users to generate tip cards that recipients redeem via a unique URL. (bitcoininsider.org)