YaBS - Yet another Business Software
* manages products and contacts as basic data.
* generates offers, orders, invoices and reminders from it.
* has basic book-keeping built in.
* writes PDF- or ODF-documents (OpenOffice-format).
* is a multiuser-software (MySQL support).
* is the successor of der MP Invoicing.
* costs ZERO licensing fees.
* is developed in Java.
* works on Windows, Linux and Mac OSX thanks to Java.
* uses any JDBC compliant database backend.
* works in heterogenous networks.
* allows fine grained security settings.
* can be extended with modules (e.g. a planned POS module).