Robinhood - Free stock trading service.
Ticker Nerd - Analysing hot stocks before the hype train arrives
StockTwits + Robinhood Integration - Zero commission trading directly from the StockTwits app
Scout Finance - Free finance app that's like having a Bloomberg in your pocket. Download:
Trading Game - Trading Game - Stocks Forex Options Gold Bitcoin
wallstreettexts - Realtime alerts on r/wallstreetbets