T-Vox.org - massive resource guide and forum
Trans Youth Family Allies (TFYA) - empowers children and families to develop supportive environments
Trans411 - Essentially a trans yellow pages
Susan’s TG Resource Guide - another major resource guide and forum
Hudson's FTM Resource Guide - excellent resource for transmasculine folks
Regender - Fascinating site that changes all pronouns in any site to all-gender pronouns. Poof!
Transgender Explored - a little on the traditional side of things, but does have some useful info on terms and resources
TransHealth.com - has a variety of health resources including transition, disability, and aging