In the pre-Internet era, obituaries represented one of the major sources for information about individuals. Obituaries Australia is an online index of obituaries for a wide range of Australians, drawn from newspaper and magazine archives.
You can search for individual obituaries based on name, or browse through entries based on date of death or other criteria such as town of birth. Currently, the site features around 1,500 obituaries, but that number is expected to expand over time. (Site visitors can also submit relevant obituaries as links or scans, though they need to have been published in a newspaper or magazine.)