Taxes and other reductions on our pay check

I know taxes and other reductions on our paycheques varies from person to person. Still I'm just wondering if anybody knows a good site that shows our reductions from our pay checks.

For instance from my pay check the CPP (Canadian Pension Plan), EI Premium (Employment Insurance Premium) and Federal Taxes are reduced. I found out the percentage taken away (compared with our income) of the CPP and EI from Canadian government sites. I'm just looking for the general rule of federal tax reduction, thanks.