Free Charity Donations

What could be better than a service that allows you to generate revenue for a charity - without it costing you a dime? The following online services allow you to contribute to charities for free. Many of these operate by encouraging you to carry out quick activities (such as simply clicking a link) to generate a small amount of advertising revenue for the charity. That way, you've traded a few seconds of your time to benefit someone else. Cool, hey?