Invoicing and payments - Fully managed open-source catalog | Elest.io

Open-source alternative to Stripe Billing and Chargebee it offers a modular architecture for metering and usage-based billing, at every stage of your company.

Bigcapital is financial accounting with intelligent reporting for faster decision-making, an open-source alternative to Quickbooks, Xero, etc.

Invoice Ninja is the leading free, open-source online invoicing app for freelancers and businesses.

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