miniInvoices is a part of the Writer’s Tools package for OpenOffice.org tailored to professional writers created by yours truly. So if you write for a living, you can use miniInvoices to generate and manage invoices without leaving the convenience of your favorite productivity suite. Although miniInvoices is not the most advanced invoicing application out there, it includes a few nifty features such as the ability to manage multiple currencies and generate reports. And since miniInvoices is not overloaded with all kinds of advanced features, it’s rather straightforward in use. Better yet, since miniInvoices is a database application developed with OpenOffice.org Base, you can easily tweak it to fit your particular needs.