Antijen is run by Aunty - who hosts many lists relating to transitioning for both families and the person in transition. It's a great resource with very nice, understanding people behind it.
The National Center for Transgender Equality (NCTE) is
a 501(c)3 social justice organization dedicated to advancing the equality
of transgender people through advocacy, collaboration and empowerment.
Address
1325 Massachusetts Ave., Suite 700 Washington, DC 20005 USA