Great financial resources website for Canadians (taxes, investment calculators, articles, etc.)
The website www.taxtips.ca is great. There are so many calculators on there including detailed and simplified tax calculators. The detailed one is so good that I used to use it for rough calculation scenarios when I had my accounting and tax business.
Lots of resources that are not Canadian specific too. For example, there is a really simple to use ROI calculator to determine your average return on investments over a period of years. Plus great articles and advice on money, debt, etc.