New York Stock Exchange
The NYSE is the world's leading and most technologically advanced equities market.  A broad spectrum of market participants, including listed companies, individual investors, institutional investors and member firms, create the NYSE market. 

NASDAQ
NASDAQ is the largest U.S. electronic stock market. With approximately 3,300 companies, it lists more companies and, on average, trades more shares per day than any other U.S. market.

American Stock Exchange
As the nation's most diversified financial marketplace, the American Stock Exchange conducts trading through an advanced centralized specialist system and is committed to providing a superior marketplace for the investing public and its members.

Chicago Board of Trade
The Chicago Board of Trade (CBOT), established in 1848, is a leading futures and futures-options exchange.

OTCBB
The OTC Bulletin Board (OTCBB) is a regulated quotation service that displays real-time quotes, last-sale prices, and volume information in over-the-counter (OTC) equity securities.

Pink Sheets
Pink Sheets LLC is the leading provider of pricing and financial information for the over-the-counter (OTC) securities markets.

Bigcharts
Excellent free web site for pricing and charting small cap & micro cap stocks.

Yahoo Finance
Offers extensive company information and analysis.