» Bicycle Helmet Research Foundation    Presents analysis and commentary about scientific studies on bicycle helmet efficiency. The effects of compulsory helmet laws on cycling is also addressed.    http://www.cyclehelmets.org/

» Head Protection Research Laboratory    Promoted as a "non-profit public benefit research organization", the HPRL tests head protection and other sports related surfaces and materials to ASTM, CPSC, DOT, and SFI standards.    http://www.hprl.org/

» Snell Memorial Foundation    Not-for-profit organization dedicated to research, education, testing and development of helmet safety standards    http://www.smf.org/

» US: Bicycle Helmet Safety Institute    FAQ, consumer guide, research resources, newsletter, helmet laws, production models, contact information and links.    http://www.bhsi.org/index.htm

» World Health Organization Helmet Initiative    Laws, resources, links, news, publications, mission statement and contact information.    http://www.whohelmets.org/

» eMedicine Health - Bicycle and Motorcycle Helmets    Consumer health resource center providing information on the value of wearing head protection while cycling. Content is general purpose.    http://www.emedicinehealth.com/bicycle_and_motorcycle_helmets/article_em.htm