Aphasia From NIDCD -- the National Institute on Deafness and Other Communication Disorders (U.S.)
Aphasia From the American Speech-Language-Hearing Association
Apraxia of Speech "Apraxia of speech, also known as verbal apraxia or dyspraxia, is a speech disorder in which a person has trouble saying what he or she wants to say correctly and consistently." From NIDCD
Dyslexia: The Gift "The Davis Dyslexia Correction Program provides people with dyslexia with the tools to overcome learning problems." Lots of free information as well as books and seminars.