invoicing — independent software & tools

4 independent invoicing listings the big search engines bury.

• Easy-Books

  github · Free · by bilalpiaic

  Open-source multi-tenant bookkeeping for SMEs — 5 business models, IFRS-aligned double-entry GL. FastAPI + SQLModel backend · Next.js 16 + React 19. Runs as a Windows/macOS desktop app, Docker Compose office server, or one-click script installer.

• velox

  github · Free · by sagarsuperuser

  Open-source billing engine for AI products — token metering with model × token_type matrix pricing, prepaid commits + drawdown, per-customer margin/COGS. Self-hosted in your VPC.

• flowsyc

  github · Free · by elonerajeev

  Flowsyc - Enterprise CRM for modern businesses. Manage clients, leads, deals, projects, tasks, invoices, HR & analytics in one powerful dashboard. Built with React, TypeScript, Prisma.

• whmazcom

  github · Free · by whmaz

  Official website repository for WHMAZ — Modern web hosting billing & automation platform.