Your old bicycle can be the perfect means of transportation for a person in need halfway around the world. The nonprofit Bicycles for Humanity collects used and even broken bikes, and repairs, recycles and distributes them. It fills shipping containers with used bikes and unloads them in developing countries. Then the container becomes the "bike shop" -- it's filled with tools and parts, too -- where the bikes are repaired on the spot. To donate, just visit bicycles-for-humanity.org.