Developer website: Draconis Software
Invotrak helps you keep track of the invoices you've issued to clients. Know what invoices are overdue and who owes you what, using the invotrak Dashboard widget. The widget connects to your free invotrak.com account, where you can manage your client invoices. Any changes you make there will appear on your Desktop, always keeping you up to date.
Mac OS X 10.4 or later