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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
TranslatedWeChat development Java SDK, supporting back-end development for WeChat Pay, Open Platform, Mini Programs, WeCom (Enterprise WeChat), Channels (video accounts), Official Accounts, and more
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
Open Source Wealth Management Software. Angular + NestJS + Prisma + Nx + TypeScript 🤍
🔎 📈 🐍 💰 Backtest trading strategies in Python.
Dolibarr ERP CRM is a modern software package to manage your company or foundation's activity (contacts, suppliers, invoices, orders, stocks, agenda, accounting, ...). it's an open source Web application (written in PHP) designed for businesses of any sizes, foundations and freelancers.
Usage-based pricing and billing for developers 🔓 Cloud or self-hosted ⚙️ No-code UI 💰 Realtime usage metering 🎟 Credits & top-ups 🔑 Control feature access
Payments for Ruby on Rails apps
Apache OFBiz is an open source product for the automation of enterprise processes. It includes framework components and business applications for ERP, CRM, E-Business/E-Commerce, Supply Chain Management and Manufacturing Resource Planning. OFBiz provides a foundation and starting point for reliable, secure and scalable enterprise solutions.
Scalable, event-driven, deep-learning-friendly backtesting library
Bitcart is a free and open-source self-hosted payment processor for BTC, LTC, BCH, XMR, ETH, TRX, USDT and more
Simple and elegant invoicing solution.
Golang client for PayPal REST API
Python live trade execution library with zipline interface.
Double-entry accounting & ERP for the web
Invoicing for freelancers & small businesses
Golang library for querying and parsing OFX
Adyen API Library for .NET
Flare is a lightweight, developer-friendly Swift framework that simplifies working with in-app purchases. It provides a clean, unified API over StoreKit and StoreKit 2, includes async/await-ready workflows, and offers built-in UI components for a seamless integration experience.
💳 Capacitor plugin for Stripe Terminal (credit card readers)