I find this interesting not so much because of the budgeting features but because you don't have to give your personal info to the charities. I don't like giving to a charity and then finding myself on their mailing lists for the next 5 years. Even worse is when they sell your info on their mailing list -- it isn't always easy to find out how to get off that stuff. I've been thinking for a while that someone should build an app to mediate between charities and donors for this reason.

An added benefit is that they can give you a single statement for your taxes. I assume that, from the IRS's perspective, you are just giving to givv.org, a non-profit.