EconExact is a free software for billing. It is based on the Scandinavian market but is available in several languages including English (Installation in Swedish). The software has all functions needed for small and middle size businesses including credit notes, reminders, export and mass update of data. There are no limits to the numbers of customers, orders, invoices.
There is also a more advanced version of the software available for a fee. This version includes other useful functions such as contract billing, ability to connect several users to the same database ove a network, export of verifications to accounting software.