Aviation Historical Society of Australia (AHSA)
The Aviation History Online Museum
http://www.aviation-history.com/index.html
The Airways Museum & Civil Aviation Historical Society
http://www.airwaysmuseum.com/
Early Australian Aviation
http://www.australia.gov.au/about-australia/australian-story/early-austn-aviation
American Historical Aviation society
http://www.aahs-online.org/
Oz Aviation
Australian National Aviation Museum
http://www.aarg.com.au/
Historic Aviation society
Monash University Aviation History site (Hargrave)
http://www.ctie.monash.edu.au/hargrave/index.htm
Canadian Aviation Historical Society
Old Machine Press – a fascinating site with lots of info about aero-engines and aircraft