ATTO: http://www.atto.buffalo.edu
Assistive Technology Training Online

PLUCK:
http://www.pluk.org/AT1.html
Parents, Let's Unite for Kids: Family Guide to Assistive Technology

Infinitec:
http://www.infinitec.org Infinite Potential through Assistive Technology

ISAAC
http://www.isaac-online.org
The International Society for AAC - works to improve the life of every child and adult with speech difficulties.