DSBudget is a very simple budget management application. It is free and open source. It is a multi-platform tool, and works on Windows, Mac, and Linux. It does have lots of bells and whistles, but is a good tool if you want to just keep track of your incomes and expenses. It lets you add all the incomes, and all the expenses, and keep track of running total.
As I mentioned in the beginning, DSBudget is not the top of the line tool in market for budgeting and financial management. But it definitely is one of the simplest. So, if you have never done financial planning or budgeting before, this might be a good financial planning software to start with. Another simple tool with more features is BudgetSketch. If you are into stocks, you need to read about JStock.

