$300B is donated to U.S. charities annually. That could be increased to $600B or more.
Engiver is a charitable giving platform that identifies and promotes "appeals" for individuals with a life enhancement opportunity but financial need to access the opportunity. Web and mobile developers build applications on the platform to tap the database of appeals and create new charitable giving applications to fund appeals.
Proof of concept application is: http://www.engiver.com/meetings?appeal=58