Related to Autism Spectrum Disorder: 

Association for Behavior Analysts International http://www.abainternational.org

Autism Research Institute www.Autism.com

Autism Speaks www.AutismSpeaks.org

Autism Society of America  www.Autism-Society.org

Behavior Analyst Certification Board  http://www.bacb.com

Cambridge Center for Behavioral Studies http://www.behavior.org

Individuals with Disabilities Education Act (IDEA)  www.idea.ed.gov

First Signs www.FirstSigns.org

Law and Advocacy  http://www.wrightslaw.com    http://idea.ed.gov

National Autism Center www.nationalautismcenter.org

National Dissemination Center for Children with Disabilities http://nichcy.org

National Institutes of Health www.nih.gov

National Center for Complimentary and Alternative Medicine http://nccam.nih.gov/                                               See My IEP www.seemyiep.com

The Friend Tree: CAST  www.thefriendtree.org 

Related to Mindfulness-Based Intervention: 

Mindful Schools www.mindfulschools.org 

Center for Mindfulness, University of Massachussets http://www.umassmed.edu/cfm/

UCLA Mindful Awareness Research Center http://marc.ucla.edu/body.cfm?id=107

Harvard Gazzette http://news.harvard.edu/gazette/tag/mindfulness-meditation/

Mindful Magazine www.mindful.org 

Center for Investigating Healthy Minds www.investigatinghealthyminds.org/