WIA, national body of Amateur Radio in Australia: http://www.wia.org.au/
VKLOGGER: http://www.vklogger.com
VK Classifieds: http://www.vkclassifieds.net.au/
KODO Technologies: http://www.kodotech.com.au/
Information on APRS: http://vk5.aprs.net.au/