Michal Glowacki, I wrote a review of a preso on Cairngorm he did at NYFlex, contacted me to let me know his group released a new Flex based application that manages expenses. This has got to be one of the hottest looking Flex applications I have seen. Have a look at http://www.iexpenseonline.com/. Using this free application, you can manage your budget, track expenses, check out your personal financial position and also work towards self-established goals.
The application is really easy to use and takes care to provide good feedback to the user. The data is visualized using some sweet Flex charts and this application is a great tool to help you stay on the financial straight and narrow.
Michal told me this was a cairngorm application, no surprise since he is an expert Cairngorm developer. I tried to view source on the app but alas, no luck. (Michal, if you are kind enough to show me how you make this application work so well, I would be much obliged.)
So have a look at http://www.iexpenseonline.com/. Let me know what you think.