Simple Invoices is an open source billing application. Simple Invoices was initially released in 2007.
Simple Invoices is a billing (aka invoicing) application that focuses on simplicity while still providing advanced features.
Why should I use Simple Invoices?
- Absolutely free, no monthly subscription
- Browser based application you can use from anywhere
- It's open source, developed by the community and it's yours
- Easily track your finances, send invoices as PDF's and hundreds of other great features
-Simple Invoices developer