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Open-source ERP with full HR and payroll modules.

Open-source accounting software for small businesses.

Open-source ERP with accounting, inventory, and HR modules.

Open-source invoicing application for freelancers.

Open-source subscription billing platform.

Open-source metering and usage-based billing.

Open-source invoicing app for freelancers.

Free invoicing, expenses, and time-tracking for freelancers

See your freelance income and workload before it happens

Manage Factur-X and ZUGFeRD 2.0 PDF invoices in PHP

Swiss QR Bill generation for Node.js and browsers

Laravel and Filament-powered accounting with full double-entry accrual

Simple invoicing REST API — send JSON, get a PDF

Super simple PDF invoicing library for Ruby