Good online brokerage firms for the Stock Market

All major brokerage firms offer their clients online services, including trading platforms, the latest market and financial news and research. Customer has to select the site that is best for them. Traders have requirements for a site, while investors have other requirements.
 
Consider this
 
Although most sites are aimed at general and basic values, however, customers may have special types of products they trade and the markets traded. For example, I use the fidelity of the investment. Scottrade to trade shares and thinkorswim of option trading.
 
Recommended Companies
 
It seems that the most popular companies for the online investment / trade all of which provide excellent platforms and services, Scottrade, Chas.Schwab; TDAmeritrade, Fidelity, E-Trade and Thinkorswim.