Here are a few useful links if you are a Canadian wanting to start a business in Australia or vice versa:

Canadian in Australia:

Department of Foreign Affairs and Trade – Australia: http://www.dfat.gov.au/

Australian Bureau of Statistics: http://www.abs.gov.au/

http://www.austrade.gov.au/Home3618/default.aspx

http://geo.international.gc.ca/asia/australia/trade/didyouknow-en.asp

http://www.economist.com/countries/Australia/

https://www.cia.gov/cia/publications/factbook/geos/as.html

https://austrade.gov.au/invest

Australian in Canada:

Foreign Affairs and International Trade Canada: http://www.dfait-maeci.gc.ca/

Statistics Canada: http://www.statcan.ca/

http://strategis.ic.gc.ca/engdoc/main.html

http://www.infoexport.gc.ca/

http://www.economist.com/countries/Canada/

https://www.cia.gov/cia/publications/factbook/geos/ca.html

http://www.investincanada.gc.ca/

http://www.gouv.qc.ca/portail/quebec/pgs/international?lang=f