Parents, Families, and Friends of Lesbians and Gays (PFLAG): The largest and best-known network of support groups for parents.
The Gay, Lesbian, and Straight Education Network (GLSEN) (pronounced "Glisten") provides assistance regarding educational issues.
The National Gay and Lesbian Task Force is the oldest civil rights and advocacy organization in the United States.
Gay & Lesbian Alliance Against Defamation promotes accurate media representations of gay people.
Scouting For All supports opening Scouting to all children.
Human Rights Campaign provides assistance on a wide range of gay and lesbian issues.
Soulforce is an organization devoted to ending religious discrimination.
COLAGE: Children of Lesbians and Gays Everywhere.
Straight Spouse Network for heterosexual partners (current or former) of gay, lesbian, bisexual, or transgender individuals.
NOTE: Religious support groups can be found here.