Free Open Source Online Invoice System: siwapp

siwapp is an open source web application, built with PHP (Symfony), that enables anyone to create & manage invoices with ease.

The application has a slick interface & provides a simple usage to create professional-looking invoices.

Some features of siwapp:

• invoices with different serial numbers can be managed
• invoices can be downloaded as PDF files
• periodical invoices can be created automatically
• & more

siwapp uses MySQL to store data & if you need periodical invoices to be e-mailed automatically, a scheduling system (like cron) must be used.

It can also work as a module (be integrated to other business management applications) with the API support.

Requirements: PHP 5.2+, MySQL
Website: http://www.siwapp.org/
Backend Demo: http://demo.siwapp.org/
Backend Demo – User-Pass: User: test – Password: test