There are numerous online accessibility-related resources available.  The staff of the Adaptive Technology Lab have compiled an extensive list of these resources.  They have been grouped into catagories.

General Accessibility Resources

http://www.bsu.edu/web/ucspubs/pdf/adaptive/general.pdf

Accessibility Resources for Individuals with Hearing Impairments

http://www.bsu.edu/web/ucspubs/pdf/adaptive/hearing.pdf

Accessibility Resources for Individuals with Language Impairments

http://www.bsu.edu/web/ucspubs/pdf/adaptive/language.pdf

Accessibility Resources for Individuals with Learning Disabilities

http://www.bsu.edu/web/ucspubs/pdf/adaptive/learning.pdf

Accessibility Resources for Individuals with Mobility Impairments

http://www.bsu.edu/web/ucspubs/pdf/adaptive/mobility.pdf

Accessibility Resources for Individuals with Visual Impairments

http://www.bsu.edu/web/ucspubs/pdf/adaptive/visual.pdf