Looking for free invoice software.

My dad has started a new company and I thought would help him look more professional if he had an invoice/printed receipt rather than a carbon receipt pad.

What free software will do this? Windows prefered but Linux is doable if it has a simple user interface and not easy to mess up. If its win95 that would be cool since I have unused licenses.


TY

I do not know of any free software but here is a list of downloadable shareware with ratings from CNET so your father can try before he buys because this type of software is expensive

http://download.com.com/sort/3120-2001-0-1-3.html?qt=free+invoice+software&ca=2001

Thanx SFN, But I think its off for now. My brother no longer wants to work with my and my dad will not become computer literate easily. So, I will just make a text file that my dad can use as a product list and give my sister the file so she can print a master out for copying when needed.

Sad part is if I added organization to this business I beleive my brother would be happier but I am not going to waste time and energy on belief in my brother.