F.E.A.T.
(Families for Early Autism Treatment)

http://www.feat.org/

M.I.N.D. Institute

http://www.ucdmc.ucdavis.edu/mindinstitute/

B.H.A.R.E. Foundation

http://www.bhare.org/

Autism Society Of America

http://www.autism-society.org/

Down Syndrome Information Alliance

http://www.downsyndromeinfo.org