Sampling of non-profits that help the disabled:

Disability Rights Education and Defense Fund www.dredf.org
Special Needs Alliance www.specialneedsalliance.org
National Disability Rights Network www.ndrn.org
Disabled American Veterans www.dav.org
Paralyzed Veterans of America www.pva.org
Blinded Veterans Association www.bva.org
Easter Seals www.easterseals.com
Muscular Dystrophy Association www.mda.org
The Arc www.thearc.org
4 Paws for Ability www.4pawsforability.org
Special Olympics www.specialolympics.org
National Alliance on Mental Illness www.nami.org
United Cerebral Palsy www.ucp.org
Reeve Foundation www.christopherreeve.org
Autism Spectrum Disorder Foundation www.myasdf.org
Parent to Parent USA http://www.p2pusa.org