- Allan G. Calkin Human Rights Education and Research Fund
(forerunner of Equality Texas) - American Civil Liberties Union (ACLU)
- AssistHers
(now part of The Montrose Center) - Astrea Foundation
- Baylor College of Medicine
- Bayou City Performing Arts
- Bering Ministries
(became Bering Omega, then merged into Avenue 360) - Crisis Intervention of Houston
- DiverseWorks
- Gay and Lesbian Chamber of Commerce, Houston
- Gay and Lesbian Community Center, San Antonio
- Gay and Lesbian Leadership Institute
- Gay and Lesbian Switchboard of Houston
(now part of The Montrose Center) - Gay, Lesbian and Straight Teachers Network (GLSTN)
- Gay Men’s Chorus of Houston
(now Bayou City Performing Arts) - Gender Infinity
- Gill Foundation
- Gulf Coast Archive and Museum of GLBT History, Inc. (GCAM)
- HATCH
(now part of The Montrose Center) - Heritage Society
- Hollyfield Foundation
- Houston Center for Photography
- Houston Gay and Lesbian Parents
- Houston Equal Rights Alliance
(absorbed into EQTX in 2008) - Houston GLBT Community Center
(closed) - Houston Hillel
- Houston LGBT History Banners
- Houston Transgender Unity Committee (HTUC)
- Human Rights Campaign
- In the Life Media
(closed) - JD Doyle Archives
- Lambda Legal Defense Fund
- Lesbian Health Initiative (LHI)
(now part of The Montrose Center) - Montrose Counseling Center
(now The Montrose Center) - Museum of Fine Arts, Houston
- National LGBTQ Task Force
- oH Project
- Old Lesbians Oral History Project
- OutVote
(closed) - OutYouth, Austin
- Parents and Friends of Lesbians and Gays (P-FLAG) Houston
- P-FLAG/HATCH Youth Scholarship Fund (PHYSF)
(became Out for Education) - Pride Houston, Inc.
(formerly Pride Committee) - Qfest
(formerly Houston Gay Lesbian Film Festival) - Rothko Chapel, Houston
- OutServe-SLDN
Servicemembers Legal Defense Fund (SMLDF) - Southwest Alternative Media Project (SWAMP)
- Stonewall Lawyers
- Texas Human Rights Foundation
(closed) - Texas Lesbian Conference
(closed) - Texas Transgender Nondiscrimination Summit
- TheaterLab
- Thunderclap Productions
- T.R.U.T.H. Project
- Uncommon Legacy
(closed) - United Way, Houston
- Victory Fund
- Women’s Educational Media
