FTM Informational Network http://www.ftminfo.net/ 

GenderTalk
http://www.gendertalk.com
The only worldwide weekly radio program that talks about transgenderism in the first person. Each week they present news, information, and exciting new voices that challenge the traditional view of gender.

Harry Benjamin Foundation International Gender Dysphoria Association, Inc.(HBIGDA) http://www.hbigda.org/
A professional organization devoted to the understanding and treatment of gender identity disorders.

International Foundation for Gender Education (IFGE)
http://www.ifge.org
Founded in 1987, is a leading advocate and  educational organization for promoting the self-definition and free expression of individual gender and gender identity.

The Intersex Society of North America (ISNA)
http://www.isna.org
An education, advocacy, and peer support organization which works to create a world free of shame, secrecy, and unwanted surgery for intersex people.

National Transgender Advocacy Coalition
http://www.ntac.org 

Renaissance Transgender Association, Inc.
http://www.ren.org
Mission: to provide the best in comprehensive education and caring support to transgendered individuals and those close to them.

Sexuality, Gender and the Law: National and International http://www.lib.uchicago.edu/~llou/sexlaw.html