Investing

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Stock Quotes

BigCharts http://www.bigcharts.com/

Broker Ratings

Expert Online Investment Advocates http://www.xolia.com/

Gomez Advisors' Internet Broker Scorecard http://www.gomez.com/

Keynote Systems' Online Brokerage Index http://www.keynote.com/

The Motley Fool http://www.fool.com/ Wide range of investment advice.

Quantitative Investing

Dismal Scientist http://www.dismalscientist.com/
Use its calculator to find out it stock market is fairly valued.

InvesterTech http://www.easystock.com/
Offers a historical beta summary scrren for volatility data going back one year.

MarketPlayer http://www.marketplayer.com/
Screen more than 4000 US equities and industry groups using more than 100 quantitative variables.

MarketTrak http://www.markettrak.com/
Computer models help forecast individual stocks and the broad market.

StockSelector http://www.stockselector.com/
"Industry Value" screen lets you see if a stock is priced fairly relative to others in its group.

Yahoo! Finance http://www.yahoo.com/
Free, all-purpose screen features basic quantitative tools.