Advocates for Youth
http://www.advocatesforyouth.org/teens
Creates programs and promotes policies which help young people make informed and responsible decisions about their sexual and reproductive health. They provide information, training, and strategic assistance to youth-serving organizations, policy-makers, youth-activists, and the media in the United States and the developing world.

American Association of Sexuality Educators, Counselors and Therapists (AASECT)
http://www.aasect.org/Home
The American Association of Sex Educators, Counselors, and Therapists (AASECT) is a not-for-profit, interdisciplinary professional organization. In addition to sexuality educators, sex counselors and sex therapists, AASECT members include physicians, nurses, social workers, psychologists, allied health professionals, clergy members, lawyers, sociologists, marriage and family counselors and therapists, family planning specialists and researchers, as well as students in relevant professional disciplines.

California Abortion & Reproductive Rights League (CARAL)
http://www.caral.org
Promoting reproductive choices throughout California.

CARAL Pro-Choice Education Fund
http://www.choice.org
The mission of the Education Fund is to provide people from all walks of life the tools they need to participate more fully in the democratic process that affects their reproductive choices, from contraception to sexuality education to abortion to healthy birth.

Center for AIDS Prevention Studies (CAPS)
http://www.epibiostat.ucsf.edu/capsweb/
CAPS, at the University of San Francisco, conducts rigorous theory-based research that will have maximum impact on the theory, practice, and policy of AIDS prevention.

Gay, Lesbian, and Straight Education Network (GLSEN)
http://www.glsen.org/
GLSEN is the leading national organization fighting to end anti-gay bias in K-12 schools.

Go Ask Alice!
http://www.goaskalice.columbia.edu
Q & A Internet service that addresses sexuality and health related issues. The site is developed by Columbia University's Health Education Program.

Henry J. Kaiser Family Foundation's Daily Health Reports on Reproductive Health
http://report.kff.org/repro/

Human Rights Campaign (HRC)
http://www.hrcusa.org
HRC is a bipartisan organization that works to advance equality based on sexual orientation and gender expression and identity, to ensure that gay, lesbian, bisexual and transgender Americans can be open, honest and safe at home, at work and in the community.

It's Your (Sex) Life
http://www.itsyoursexlife.com
Provides reliable, objective sexual health information to young adults. The site is developed by The Henry J. Kaiser Family Foundation.

National Abortion and Reproductive Rights Action League (NARAL)
http://www.naral.org/
NARAL works through the political and legislative systems to advocate for comprehensive reproductive health policies and to secure reproductive choice for all Americans.

National Campaign to Prevent Teen Pregnancy
http://www.teenpregnancy.org
Aims to improve the well-being of children, youth, and families by reducing teen pregnancy.

National Gay and Lesbian Task Force
http://www.ngltf.org/
NGLTF is the national progressive organization working for the civil rights of gay, lesbian, bisexual and transgendered people, with the vision and commitment to building a powerful political movement.

P.E.R.S.O.N. Project
http://www.youth.org/loco/PERSONProject/
An informal, national network of organizations and individuals working to ensure that fair, accurate and unbiased information regarding lesbian, gay, bisexual and transgender people and about the nature and diversity of sexual orientation is presented to America's youth as part of public school education.

PFLAG
http://www.pflag.org/
PFLAG promotes the health and well-being of gay, lesbian, bisexual and transgendered persons, their families and friends through: support, to cope with an adverse society; education, to enlighten an ill-informed public; and advocacy, to end discrimination and to secure equal civil rights. Parents, Families and Friends of Lesbians and Gays provides opportunity for dialogue about sexual orientation and gender identity, and acts to create a society that is healthy and respectful of human diversity.

Planned Parenthood Federation of America
http://www.plannedparenthood.org
Sexuality Education Resources and more.

SEX, etc.
http://www.sxetc.org
Provides information by and for teens, on a variety of sexual health issues. The site is developed by the Network for Family Life Education.

Sexuality Information and Education Council of the United States (SIECUS)
http://www.siecus.org
SIECUS is a national nonprofit organization which affirms that sexuality is a natural and healthy part of living.  SIECUS develops, collects and disseminates information, promotes comprehensive information about sexuality, and advocates the right of individuals to make responsible sexual choices.