Easy but limited and buggy
This invoicing app is easy to use but weak and buggy. Charging for services only permits an hourly rate and no other options (e.g., fixed price for a job). While the preferences page appears to allow for changing the payment time, the pdf version of the invoice always shows a 30 day payment time. Invoice dates show 2013 on the pdfs produced and there appears to be no way to change this on the edit page for the invoice.
Currently not recommended
Graham J. about NeoOffice Invoice