Click to Cure Cancer: Make a free donation to laboratory research departments at The Memorial Sloan-Kettering Cancer Center in New York.
Climb to End Breast Cancer: Care2com free donation site for breast cancer.
The Breast Cancer Site: Founded to help offer free mammograms to underprivileged women nationwide. With a simple, daily "click" visitors help provide mammograms to those in need.
Web Of Charity: Free donation of money to help cancer patients and support cancer research.