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Tags: Finance and trading
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Usage-based pricing and billing for developers 🔓 Cloud or self-hosted ⚙️ No-code UI 💰 Realtime usage metering 🎟 Credits & top-ups 🔑 Control feature access

A Python Finance Library that focuses on the pricing and risk-management of Financial Derivatives, including fixed-income, equity, FX and credit derivatives.

  • risk
  • pricing
  • risk-management
  • asset-allocation

PHP Payment processing library. It offers everything you need to work with payments: Credit card & offsite purchasing, subscriptions, payouts etc.

Free invoice builder & GST billing software for India. Make GST invoices, quotations, bills of supply and credit notes as PDF; GSTR-1/3B reports. Free invoice maker for shops, freelancers & small businesses. Free Tally alternative: open source, 100% offline, no signup, no limits.

  • gst
  • billing-software-open-source
  • gst-billing
  • hsn-code

ColdFusion payment processing library makes plumbing e-commerce apps easy. Charging credit cards has never been easier. Inspired by Ruby's ActiveMerchant.

  • cfml
  • coldfusion