Java - Which accounting module is best embedded in my JAVA application?

Question

I am developing a Java application. I want to integrate some accounting module into my application. I do not need some kind of multifunctional accounting module. I just want to support

• salaries
• expenses
• creating invoices

Do you know any FREE OPEN SOURCE accounting module so that I can integrate it with my application.

Answer 1

Take a look at GNU, I think it matches your description:

http://www.gnuaccounting.org/