Free and Open Source Invoicing, Expenses & Time-Tracking
Kimai is a web-based multi-user time-tracking application
Fullstack open source Invoicing application made with MongoDB
Accounting & Best Practice Business Administration System
A super simple way to create & send invoices, receive payments online
Convert HTML to PDF using Webkit (QtWebKit)
Create and print simple invoices
A complete invoice managment solution for Elastix PBX
Free web-based invoicing primarily for Finnish companies
Keep track of all your job costs, make sure you don't lose money