Atlasgeo: Australia - Animated GIF image of the national flag. - http://www.atlasgeo.net/flags/anglais/html/Eaustralia.htm
Ausflag: Australian Flags Since 1788 - National, state, territory, and other flags of the past and present. - http://www.ausflag.com.au/flags/flags.html
Flags of the World: Australia - Design and history of national, state, territorial, military, historical, and native peoples' flags. - http://flagspot.net/flags/au.html
The Australian Flag - Information on the national, state, territorial, and other flags. - http://www.anbg.gov.au/oz/flag.html
Theodora.com - Flags of Australia - Offers national and aboriginal flags of Australia. - http://www.theodora.com/flags/australia_flag.html
Australian National Flag Association - Includes images, description, and instructions for making a flag of Australia. - http://www.flagaustnat.asn.au