The University of Colorado's Assistive Technology Partners program is designed to provide services, professional development and information concerning low- and high- assistive technology for individuals with autism, mental retardation, paralysis, etc. The site's Resources page (http://www.ucdenver.edu/academics/colleges/medicalschool/programs/atp/Resources/Pages/Resources.aspx) has a vast library of materials, for free (see Handouts), to help make communication easier for individuals with disabilities.