Free Desktop book-keeping software for small-businesses & freelancers
Kimai is a web-based multi-user time-tracking application
Free Invoice & Billing Software for Windows, Linux & Mac
Time-Tracking for companies and teams with up to 250+ users
Accounting & Best Practice Business Administration System
Accounting system for smaller companies written in GnuCobol.
ERP Server
Free Bootstrap 4 admin/dashboard template
Fullstack open source Invoicing application made with MongoDB
The Open Source Invoice Management Software
Mutasyon is a script can add customer, products, inventory or invoice
Free web-based invoicing primarily for Finnish companies