RAINN: Rape, Abuse and Incest National Network

"The Rape, Abuse & Incest National Network is the nation's largest anti-sexual violence organization. RAINN operates the National Sexual Assault Hotline at 1.800.656.HOPE and the National Sexual Assault Online Hotline at rainn.org, and publicizes the hotlines' free, confidential services; educates the public about sexual violence; and leads national efforts to prevent sexual violence, improve services to victims and ensure that rapists are brought to justice."

http://www.rainn.org/