All of the following sites include advertising and some are essentially commercial sites, but the news coverage is comprehensive and there are some useful historical data, tools and graphics available on all.
BigCharts - investment research tools: interactive charts, quotes, industry analysis, market news & commentary
ClearStation – integrates portfolio management, education, analysis, & community discussion
MSN Money Central news and information on personal finance and investing brought to you by Thomson Reuters and Microsoft. Various calculators and decision making guides can be found here.
Moneychimp a useful and accessible financial education resource.
The Motley Fool their mission is to “educate, amuse, and enrich.” The site offers a wide variety of free and fee-based products and services to help consumers take control of their financial lives.
Yahoo!Finance financial information, stock quotes, market statistics,mutual funds, ETF’s, bonds, options, industries, and currency, it’s all here.
Google Finance
Bankrate.com