The NTSB aviation accident database contains information from 1962 and later about civil aviation accidents and selected incidents within the United States, its territories and possessions, and in international waters
Created by the Aircraft Owners and Pilots Association (AOPA), this site includes short interactive guides and longer online courses and quizzes on airplane safety. You can also read a number of articles from their publication "Safety Pilot".
AirSafe provides factual information on events that involve the deaths of airline passengers. It is meant for the passenger and not the professional. AirSafe provides fatal event information by airline and aircraft model, as well as information about current aviation safety issues.
This is a large site sponsored by the Flight Safety Foundation. It contains a searchable database of accident reports, information on airline safety, news, statistics photos, and a large collection of links to safety related web resources