MarketWatch has Investor Tools, Stock Research Tools
eMasterTrade lists advanced tools for trading and investing
InvestorGuide.com has sections that benefit everyone equally are those covering online brokers, stock information, and a comprehensive list of publicly traded companies (including home pages, research, and discussion.
NASDAQ: Stock Research Tools - Stock Market Research - Free Investment Research
StockScores: There is a wealth of knowledge and easy to use tools available on the site completely for free. Serious traders should consider the more advanced tools and educational products available.
Kiplinger has tools for stocks, funds, bonds, budgeting, college, credit, insurance, real estate, taxes, retirement, savings, retirement income and more.
MarketEdge: Whether you are a first time investor, a seasoned pro, an "in and out" day trader or a long term investor, Market Edge will provide you with the tools you need for success in today's dynamic markets.
Yahoo! Stock research center has many varied and interesting tools as one would expect.
SmartMoney.com also has an interesting and unique set of tools for investors.
StockCharts.com: Our SharpCharts tool lets you create the web's best looking financial charts. Our Scan Engine shows you the market's best investing opportunities. Our Chart School is full of easy-to-read educational articles.
Forbes has a variety of interesting and different investment and planning tools
Choose to Save provides investment calculators in eighteen different categories
Looking for an investment tool? One of these sites may have exactly what you need.
FundLibrary.com has a Tools Directory that will enhance your understanding of the markets by crunching numbers and charts.