youpi-pg / YouPI-PG

A self-hosted UPI & COD payment gateway with zero per-transaction platform fees, universal JavaScript checkout integration, dynamic QR payments, WhatsApp OTP authentication, and automated payment verification.

Glench / ExtPay

The JavaScript library for ExtensionPay.com — payments for your browser extensions, no server needed.

recurly / recurly-js

Simple subscription billing in the browser

stackernews / stacker.news

moderating forums with money

interledger / rfcs

Specifications for Interledger and related protocols

murattahtaci / turkish-bank-logos-svg

Türkiye'deki 35 banka ve 5 ödeme / e-para kuruluşunun orijinal SVG logoları · Original SVG logos of 35 banks and 5 payment / e-money institutions in Turkey

ethnv / BUYIN

Familiar money. New markets. BUYIN financial access layer for Robinhood Chain — product documentation and an offline reference.

Josh-Gi3r / blueballs

Open-source software for building a neobank. Product screens, a 181-operation banking API, a double-entry ledger and a canonical stablecoin FX engine. MIT licensed, self-hostable, runs on Node or Cloudflare Workers.