Free and Open Source Invoicing, Expenses & Time-Tracking
Free Desktop book-keeping software for small-businesses & freelancers
Free Invoice & Billing Software for Windows, Linux & Mac
Voltiva - worldwide smart electricity billing: auditable invoice engine, tariff management, OCR import, PDF export (PyQt6)
Accounting & Best Practice Business Administration System
Accounting system for smaller companies written in GnuCobol.
Free & Open Source Invoice App for Freelancers & Small Businesses
Open-source online accounting software in PHP and MySQL
A super simple way to create & send invoices, receive payments online
FreelancerBooks -Project Management for Freelancers and Agencies
The Open Source Invoice Management Software
Mutasyon is a script can add customer, products, inventory or invoice
Captures time & expense by project and account; generates invoice
Software platform
Alternative Gnucash implementation