The Administration for Community Living (ACL) is a division of the US Department of Health and Human Services (HHS) that funds research and education about older persons and persons with disabilities, and that has promoted SDM in a variety of ways.
The National Council on Disability (NCD) is a federal agency with members appointed by the President and Congress that advises them about “policies, programs, practices and procedures that effect the lives of people with disabilities.” It published two major studies on alternatives to guardianship in 2018 and 2019.
The Autistic Self Advocacy Network (ASAN) is a not-for-profit run by and for autistic people serving as a national grassroots disability rights organization for the autistic community. This site contains resources about SDM including for transition age youth, transition to the community and more.
Supported Decision-Making New York (SDMNY) is a project funded by the NYS Developmental Disabilities Planning Council. This site contains information for persons with developmental disabilities, their families, professionals and the general public, as well as news about SDMNY and a large resource library.
The National Resource Center on Supported Decision-Making (NRCSDM) was funded by the Administration for Community Living for five years, but its site still contains a wealth of information about SDM around the country
The Center for Public Responsibility (CPR) is a well established not-for-profit that has been engaged in disability rights advocacy and litigation for decades. This site details its work around SDM, including the first pilot project in the US (see year 1 and year 2 evaluations) and a number of newer projects.