Robinhood - Free stock trading service.
TradeStation - Whether you trade stocks, ETFs, options or futures, TradeStation’s award-winning tools and...
Contora - Alternative data on the companies activity on the web for retail traders
OptionsHouse - OptionsHouse is an online stock trading platform with an easy-to-use interface.
Stockflare - Stockflare helps anyone pick stocks, easily. Investing doesn’t have to be complicated.
Questrade - Questrade IQ Mobile is everything you need to trade stocks - right in the palm of your hand.