Marsco is one of the oldest online discount stock brokerage which offers several financial or cash management services. Marsco’s brokerage account is designed for investors who want the flexibility to invest. Investors or traders can trade stock online for $3.95 per trade with no shares limit and option for $3.95 per trade plus $1.25 per contract. It also offers a complete web based trading platform.

Interactive Brokers (IB) is one of online discount brokerage account which offers trading platform to trade online stock or option for investors or traders. Interactive Brokers is especially famous among the active traders. Investor can trade for $0.005 per share with $1.00 minimum.
Products: Stocks, bonds, mutual funds, options, foreign investments
Market Orders: $0.005 per shares ($1.00 minimum)
Limit Orders: $0.005 per shares ($1.00 minimum)
Broker-Assisted Orders: $0.01 per shares ($100.00 min)
Mutual Funds: $14.95/ trade
Options: $0.70/contract

OptionsHouse is an online brokerage services that offers low cost options and stocks trades to its large client base of investors or traders. As one of the known discount broker, they also provide low cost stock trades and other financial services (checking & Debit card) for their customers. To trade stock, it only cost $2.95 per trade. It also offers various investing tools such as Risk Viewer, Call Spread Investigator, Covered Call Investigator, Put spread Investigator, Streaming charts and news, Probability calculator, Profit & Loss Cal, Stock Screener and Volatility Charts.