Robinhood - Free stock trading service.
MetaTrader5 - World-leading multi-asset platform that allows trading Forex, Stocks, Futures and CFDs.
Bux - Casual stock trading - thumb swipes only
ProRealTime - Online trading, charting and technical analysis of stocks, futures, forex and commodities.
Contora - Alternative data on the companies activity on the web for retail traders
TradingView - The best charting tool for crypto and stocks