What they need to do is create one that integrates fully in the new Gnome environment. Recurring or otherwise expected payments should show up as a "Personal Finance" calendar in Evolution. Among the list of valid payees should be the members of your Gnome address book. This should work in reverse as well. If I schedule a lunch meeting with someone, when I open the Personal Finance app, it should see that I had a lunch meeting and ask me if I paid, how much it cost, and whether it was a tax deduction or not. These are the sorts of things that will make Gnome a totally integrated, desktop leader. And why not make the Personal Finance software act as a system service like the Evolution-Data-Server? Other apps could query for financial info. OpenOffice Calc could offer more advanced financial analysis tools by grabbing data from the service. Evolution could add a "Business" address book that consists of people for whom payments have been made/received.