American Economic Association. Most broadly based of the economics professional associations and publisher of the American Economic Review.
American Economic Association's student pages. Pages specifically for undergraduate students from the most broadly based of the economics professional associations.
Association of Private Enterprise Education. Professional association whose mission is "to put into action accurate and objective understandings of private enterprise."
Dismal Scientist. Good statistics and commentary on current economic issues.
International Association for Feminist Economics. This non-profit organization advancing feminist inquiry of economic issues has lots of good links and resources on its website.
MoneyCentral.com. Microsoft's take on personal finance.
Quicken.com. A non-Microsoft take on personal finance.
Supply-Side Investor. Macroeconomic site from a definite supply-side perspective.