Global Giving (globalgiving.com) provides an easy way for people to find specific charitable projects that they want to make a difference in.
This widget lets you make a difference for a
cause that you care about by directing your readers to the donation page for any GlobalGiving.com project or projects that you feel a connection to.
Since Global Giving is built around the concept of individuals making small donations to the projects they care about, this is a great way to help combine the small contributions of your readers into something that will make a more substantial impact on the funding of a project.
Global Giving has a lot of projects - you'll definitely be able to find something that will connect with you, and with your readers.