KMY - KMyMoney Data File is a file extension that was designed by KMyMoney. This is a personal finance manager that is mainly used by Linux. You will be able to use this extension for saving financial data and even bank account transactions. It also comes in handy for investments, assets, and even credit card information. You will be able to look at all of your XML data manually just by renaming the extension to a different format. You can also use this extension right along with Windows when first installing KDE Platform. It can also be used on MAC OS X if you are using MacPorts.