http://www.acds.org
2. NADS
http://www.nads.org
3. NDSS
http://www.ndss.org
4. DownsNet
http://www.downsnet.org
5. Down Syndrome
http://www.downsyndrome.com
6. Pathfinder Village
http://www.pathfindervillage.org
7. DownsCity
http://www.downscity.com
8. Down Syndrome: Health Issues
http://www.ds-health.com
9. What's Up with Downs?
http://www.idt.net
10. Mental Health Net Down Syndrome
http://www.cmhc.com