Derek Clark has announced Ez Budget 1.1 for Mac OS X, software designed to help you implement an envelope budgeting system without having to deal with lots of real envelopes or carrying cash.
It does this by securely syncing with your bank account and downloading your transactions. You simply allocate your income to the envelopes you want and then categorize your transactions as they come in.
Ez Budget syncs between Macs, iPads, and iPhones so that you can have your budget when you need it. For example, you can sit down with your Mac and calculate how much you want to spend in each category and then when you are out shopping you can check your balance on your iPhone to see how much is left in your grocery budget.
Ez Budget requires Mac OS X 10.6 or later. It costs US$24.99 and is available worldwide through the Mac App Store in the Finance category.