Search Google to find CC licensed material. In advanced search, scroll down to usage rights and click on "free to use or share". You can then conduct your search as normal to find Creative Commons results.
Contains links to open-access post secondary education in the areas of Chemistry, Biology, Geosciences, Mathematics, Statistics, Physics, Social Sciences, Engineering, Medicine, Agriculture, Photosciences, Humanities
Data.gov.au provides an easy way to find, access and reuse public datasets from the Australian Government. The site provides both downloadable datasets and links to online data services provided by other government sources.