Open-source Invoice, Expense & Time-Tracking
"InvoiceNinja is an open-source platform to invoice, track payments, expenses, and time billable tasks for clients.
Our software is designed specifically for small- to medium-sized companies and freelancers because we know how difficult it can be to juggle hefty software costs and financial admin while you’re trying to focus on the rest of your business.
It supports simple invoicing, multiple payment options, expense & vendor management, and much more."