All for Good
Inspired by the call of President Obama to engage more Americans in community service, a group of volunteering enthusiasts from Google, Craigslist Foundation, UCLA, YouTube, FanFeedr and Aha! Ink have produced an open source application that allows anyone to find and share volunteer activities.
Google is hosting the All for Good website and, in a spirit of openness, the site has a data API that anyone can use to display the same data on their own sites. To search for volunteering activities users just need to enter their location and the site returns a list of opportunities and a Google Map showing their location.