The Basics:

LGBT

Lesbian

Gay

Bisexuality

Transgender

Homosexuality

Asexuality

Terminology of Homosexuality

Coming Out

History:

Timeline of LGBT History

LGBT History

LGBT Movements

Culture:

LGBT Culture

LGBT Linguistics

LGBT Slang

Sexual and Gender-Identity based Cultures

LGBT Symbols

Sexual Diversity

Gender Diversity

Gender System

LGBT Culture in New York City

List of famous LGBT People

Arts and Music:

Queer Art

LGBT Music

LGBT representation in hip-hop music

Literature:

Gay Literature

Lesbian Literature

Bisexual Literature

Transgender Literature

LGBT Themes in Greek and Roman Mythology

LGBT Themes in Speculative Fiction

LGBT Themes in Horror Fiction

LGBT Themes in Comics

Cinema:

LGBT-related Films

New Queer Cinema

History of Homosexuality in American Films

List of LGBT Film Festivals

Nature:

Homosexual Behaviour in Animals

List of Animals displaying Homosexual Behaviour

Human Rights:

Discrimination against LGBT People

Sexual Orientation Discrimination

Homophobia

Transphobia

Violence against LGBT People