digitalmeowmix:

Transgender/Transsexual:

FTM International http://www.ftm-intl.org/

Gender Blogs http://genderblogs.com/

Gender Education and Advocacy http://www.gender.org/

Gender Law and Policy http://www.transgenderlaw.org

Gender PAC http://www.gpac.org

Gender Talk http://www.gendertalk.com

International Foundation for Gender Education http://www.ifge.org/

Laura’s Playground http://www.lauras-playground.com/

National Center for Transgender Equality http://transequality.org/

Renaissance Transgender Association http://www.ren.org

Survivor Project http://www.survivorproject.org/

TG Guide http://www.tgguide.com/

TransGender United http://tgunited.org/

Trans Youth Family Allies www.imatyfa.org

Transadvocate http://www.transadvocate.com/

Transgender Law and Policy Institute http://www.transgenderlaw.org/

Other Gender or Sex Minorities in the LGB and Trans community:

GenderQueer:
Gender Fork—Beauty in Ambiguity http://genderfork.com/
GenderQueer Revolution http://www.genderqueerrevolution.org/

Intersex:
Bodies Like Ours (Intersex) http://www.bodieslikeours.org/forums/
Intersex Society of North America http://www.isna.org/
Organisation Intersex International: OII in USA http://oiiusa.org/

Organisation Intersex International-USA http://oii-usa.blogspot.com/

Survivor Project (Trans & Intersex) http://www.survivorproject.org/

Transgender and Gender Non-Conformity: Books

From the Inside Out: Radical Gender Transformation, FTM and Beyond edited by Morty Diamond

Gender Outlaw: On Men, Women and the Rest of Us by Kate Bornstein

Gender Outlaws: The Next Generation by Kate Bornstein and S. Bear Bergman

Genderism: Transgender Students, Binary Systems and Higher Education by Brent Bilodeau

GenderQueer: Voices From Beyond the Sexual Binary by Joan Nestle

Hybrid: Bisexuals, Multiracials, and Other Misfits Under American Law (Critical America Series) by Ruth Colker

Nobody Passes: Rejecting the Rules of Gender and Conformity by Matt Bernstein Sycamore

Transgender Care: Recommended Guidelines, Practical Information, and Personal Accounts by Gianna E. Israel, Donald E. Tarver, and Diane Shaffer

Transgender History (Seal Studies) by Susan Stryker

Transgender Rights by Paisley Currah

Transgender Voices: Beyond Women and Men by Lori B. Girshick and Jamison Green

Transitions-A Guide to Transitioning for Transsexuals and Their Families by Mara Drummond

Transforming Gender: Transgender Practices of Identity, Intimacy and Care by Sally Hines

Transgender Men

The Testosterone Files by Max Wolf

Transmen and FTMs: Identities, Bodies, Gender and Sexuality by Jason Cromwell

Transgender Women

The Transgender Companion (Male to Female): The Complete Guide to Becoming the Woman You Want to Be by Jennifer Seeley

Whipping Girl: A Transsexual Woman on Sexism by Julia Serano