The Department of Justice has a webpage dedicated to information on the Americans with Disabilities Act. There is a section on current developments, regulations, publications, links to government agencies, and information on enforcement.
The Department of Education provides information on IDEA (Individuals with Disabilities Education Act).
The Department of Labor has links on Disability Employment topics.
The Equal Employment Opportunity Commission (EEOC) also has information on Disability and Employment.
American Bar Association Commission on Disability Rights has publications, sections on advocacy, courthouse accessibility resources, resource list for law students with disabilities, and more.
ADA National Network, according to its website, "provides information, guidance and training on the Americans with Disabilities Act (ADA), tailored to meet the needs of individuals at local, regional and national levels."
Disability Rights Education and Defense Fund has publications, laws, disability rights issues, and more.