The Bank of Canada
This site is a great source for exchange rates, prime rates etc

The Federal Reserve .
The site for the U.S. Federal Reserve.

Corporate Information
This site provides a wealth of information about companies around the world.

Standard and Poors
Bond and Company Credit Ratings

Dominion Bond Rating Service
Bond and Credit Ratings

SEDAR
Public filings for Canadian companies. The first place to look for Annual Reports, Prospectuses, Quarterlies, Annual Information Forms, Proxies etc

EDGAR
The first place to check for filings relevant to U.S. companies.

The Toronto Stock Exchange
The official site of the Toronto Stock Exchange

The New York Stock Exchange
The official web site for the New York Stock Exchange