First of all, I want to say a big thanks to you for your great work in giving small developers the chance to earn a buck for their work!
And on that note, I would like to recommend a great software that I tried and found really superb...
It's called "BUDGET" and it can be found
here --> http://www.snowmintcs.com/products/budgetwin/
With this app, you can stay up to date with the money you spend on everyday things and found out if your gonna be in big doodoo this month or if your gonna have some extra money to spend on some nice apps ;)
Thanks for reading me and go take a look at their site.