The Ryerson Index covers death notices and obituaries in 149 Australian newspapers. There are currently over 2 million entries. Many of the newspaper titles are from New South Wales but the following states are also included: Queensland, South Australia, Tasmania, Victoria and the Northern Territory. The majority of the entries are for recent deaths but in some cases, such as the Sydney Morning Herald, historical death notices from the 19th century have been included. See Newspaper coverage for details of each title.
http://www.ryersonindex.org
Searchable database of more than 5,000 deaths extracted from police reports in the South Australian Government Gazettes 1845-1941. This includes the Northern Territory until the end of 1910.
http://www.ach.familyhistorysa.info/gazettedeaths.html
Information on how to apply for birth, marriage and death certificates for the Northern Territory. Indexes are not available online.
http://www.nt.gov.au/justice/bdm/index.shtml