NARIC (National Rehabilitation Information Center for Independence)
REHABDATA, a bibliographic database from NARIC
CODI (Cornucopia of Disability Information) - University at Buffalo. Covers aging, assistive technology, computing, employment, legal issues, mobility, universal design, etc.
CIRRIE Center for International Rehabilitation Research Information and Exchange at University of Buffalo (NY)
PsycINFO - 2.5M+ citations from 2,400 mostly peer-reviewed journals from 1887 forward and from books, book chapters and dissertations dating back to the early 1800's
Mental Measurements Yearbook - database that helps you ID which volume of the print series of the same title details psychological tests.
Abledata Searchable database for assistive technologies - product info & distributors' contact info.
Trace Info on accessible technology, including hardware, software, manufactuers, etc.
Disability.gov Covers civil rights, education, emergency preparedness, employment, housing, transportation.
National Clearinghouse of Rehabilitation Training Materials from Oklahoma State. Includes journal archive from Vocational Evaluation and Work Adjustment Association and archive of abstracts from Journal of Rehabilitation Administration.
IEEE Xplore an engineering database that includes assistive technologies.