For a donation of a day’s salary, you can Own the Day at Architecture for Humanity. The proceeds go to fund work around the globe.
From their website:
You’ll help support the work of Architecture for Humanity and allow architects and designers all over the world to offer their services pro bono-just by clicking your mouse. Think of it as community service plus design (minus the parole officer.)
Once you have made a donation, choose the day of your choice, and your name will appear on our nifty calendar for that day. We’ll also feature each day’s sponsors on our homepage and on the homepage of the Open Architecture Network. That’s it. Just think of all of the great projects you will have helped design and build all over the world without ever having to leave your desk.