Personal finance programs today have a lot of features, but they can be quite expensive. Buddi is an open source and easy to use personal finance software. Developed by Wyatt Olson, there are versions for Windows, the Mac and Linux. Note that it only runs on Mac OS X 10.4 or later. Buddi provides enough budgeting and finance functions without complicated menus and options. The tabbed interface is intuitive. You can make new accounts for savings, investments, checking and cash. You can also add a prepaid account, loan, line of credit liability and credit card.