Recently I was tidying up some loose ends in my tree and found myself in need of an obituary for a Scottish man who died in Australia. A few clicks later and I was using Trove for the first time.
Trove is run by the National Library of Australia and contains oodles of Australian information for FREE! It only took a minute to familiarize myself enough to find the very item I was looking for.
If you have some Australian connections in your tree, give Trove a try.