Best Brokerage websites. Brokers enable investors to buy and sell stocks, bonds and Exchange Traded Funds. Many will provide extra services like free access to prices, ability to chart data in real time and  also market commentary.

Brokerage-Review.com
Is a nice website that reviews the major brokers across the world.  Users can compare brokers by cost and there is also a useful comments section with people commenting on their experience with the broker concerned.

Onwallstreet.com
On Wall Street provides brokerage firms 
with information and analysis in the industry. It covers a wide range of topics, such as the latest changes in
broker compensation, breaking news on the regulatory and legal fronts, new
product offerings, the consolidation of companies and the movement of brokers and top executives between firms.

List of Brokers in United States

Ameritrade

Courtney Smith & Company

E*TRADE

Edward Jones

Lightspeed

MB Trading

Merrill Lynch

Scottrade

Sogotrade

T. Rowe Price

TradePro Online Trading .