The Medical Library Association has a list of the "Top 10 Most Useful Websites" for Consumer Health information. Check out these free sites from any computer to find good, evidence-based info on many different conditions including cancer, HIV, children's health and more!
Cancer.gov
Centers for Disease Control and Prevention (CDC)
familydoctor.org
healthfinder®
HIV InSite
Kidshealth®
Mayo Clinic
MEDEM: an information partnership of medical societies
MedlinePlus (English or Spanish)
NOAH: New York Online Access to Health