• Breast Cancer: from adjuvant online, benefits of adjuvant chemotherapy
• Breast Cancer Lymph Node Risk from Sloan Kettering
• Calulate the risk of getting breast cancer go here
• Cancer Risk: from Harvard, various types of cancer
• Colon Cancer: from Mayo Clinic, benefits of chemotherapy
• Colon cancer risk of Lynch syndrome from Dana Farber
• Life Expectancy Calculators
• Melanoma: from the Mayo Clinic benefits from taking interferon
• Prostate Cancer: from Sloan Kettering, risks of spread, cure rates, PSA doubling time and life expectancy
• Prostate Cancer: risks of spread, cure rates, survival with or without treatment
• Prostate cancer: Partin Tables and the Han Tables

Sloan Kettering has nomograms for breast, gastric, lung, melanoma, pancreas, renal (kidney) and sarcoma go here
Adjuvant online has survival and benefit calculators for breast, lung and colon here
PDR Health has a number of cancer calculators here