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Open source, composable payments platform | PCI compliant | SaaS and Self-host options | Enables connectivity to multiple payment, payout, fraud, vault and tokenization providers | Uplifts authorization with intelligent routing and revenue recovery | Reduce payment processing costs with cost observability | Reduces payment ops with reconciliation
Saleor Core: the high performance, composable, headless commerce API.
A 100% free modern JS SaaS boilerplate (React, NodeJS, Prisma). Full-featured: Auth (email, google, github, slack, MS), Email sending, Background jobs, Landing page, Payments (Stripe, Polar.sh), Shadcn UI, S3 file upload. AI-ready with tailored AGENTS.md, skills, and Claude Code plugin. One cmd deploy. Powered by Wasp full-stack framework.
A source-available invoice, quote, project and time-tracking app built with Laravel
Polar — A billing platform for the intelligence era
Online Accounting Software
List of 128 languages for Laravel Framework, Laravel Jetstream, Laravel Fortify, Laravel Breeze, Laravel Cashier, Laravel Nova and Laravel UI.
Payments for Ruby on Rails apps
Bitcart is a free and open-source self-hosted payment processor for BTC, LTC, BCH, XMR, ETH, TRX, USDT and more
Payum offers everything you need to work with payments. From simplest use cases to very advanced ones.
ACH implements a reader, writer, and validator for Automated Clearing House (ACH) files. The HTTP server is available in a Docker image and the Go package is available.
ecommerce microservice
Stripe library for Vapor
Go middleware for monetizing your API on a per-request basis with Bitcoin and Lightning ⚡️
Adyen API Library for .NET
A website for Western Friend (westernfriend.org), a Quaker publication that provides resources and support for Quaker communities and individuals seeking to live out their faith in the world. Western Friend is part of the Religious Society of Friends.
:money_with_wings: PayPal REST API client for the Elixir language (elixir-lang)
Algorand QR Code generator is a JavaScript module that outputs an standard QR code (exportable to SVG file and text) from a JSON object. It works in terminal, NodeJS and modern browsers. Complies to Algorand ABNF Grammar.
A comprehensive, zero-dependency Go SDK for the Paystack API
Rails integration for Ripple payment notifications.
Golang SDK for Dusupay payment gateway API (Unofficial)
Fasapay payment gateway XML API Client for Go (Unofficial)
Any API becomes a Lightning toll booth in one line. L402 middleware for Express, Hono, Deno, Bun, and Workers.