UK Turner Society 
Contains support, information on hormone replacement therapy for folks with Turner's, health issues for folks with TS, and personal stories.
http://www.tss.org.uk/The Sex That Dare Not Speak Its Name 
A long article by Emily Nussbaum in the current issue of Lingua Franca details the rise of the increasingly successful intersex social justice movement, its alliances with humanists and social scientists in the academy, and growing pockets of change within the medical community.
http://www.isna.org/pr/pr4-29-99.html
The Genetic Interest Group 
UK-based organisation that aims to increase the public/government profile of genetic conditions. The AIS Support Group (UK) is affiliated to GIG.
http://www.gig.org.uk
Inside Intersexuality 
Information and support for intersexuals and parents of intersexuals. Articles on genital surgery, gender orientation, sexual identity, and message board.
http://www.healthyplace.com/communities/gender/intersexuals/
Hypospadias 
Why it happens, what it is, what to do; see photos of hypospadias and contact others with it. Discusses androgen insensitivity, testicular feminization syndrome, development, and even ISNA.
http://www.the-penis.com/hypospadias.html
Genetic Org 
Klinfelter's support site. Designed to provide support and education for families and professionals dealing with these genetic conditions, including sex chromosome variations 47XXY, 48XXYY, 48XXXY, 49XXXXY, and 46XY/47XXY mosaic.
http://www.genetic.org/
GIRES: The Gender Identity Research & Education Society 
Registered UK charity that sponsors research and education on gender identity.
http://www.gires.org.uk/
Guevedoces of the Dominican Republic 
About these children who comprised 2% of live births in the 1970s. They appeared to be girls at birth, but developed muscles, testes, and a penis at puberty.
http://www.usrf.org/news/010308-guevedoces.html
Ambiguous Genitalia and Intersexuality 
Discussion of the types and causes of intersexuality.
http://author.emedicine.com/PED/topic1492.htm
Abnormal Sex Differentiaton 
This site will help parents and patients understand intersexuality and the challenges that accompany syndromes of "abnormal" sex differentiation. From the Johns Hopkins Children's Center.
http://www.hopkinsmedicine.org/pediatricendocrinology/
Sex Police 
The biology of sex is being hotly debated, as parents, doctors and researchers reevaluate what it means to be male and female. This is an article about 'gender reinforcement' surgery by a subscriber to the US branch of the AIS Support Group.
http://www.salon.com/health/feature/1999/04/05/sex_police/
Transcending Boundaries Conference 
Conference for bisexual/pansexual, trans/genderqueer, and intersex people and our allies. Includes information on registration, housing, travel and workshops.
http://www.transcendingboundaries.org/