Robinhood - Free stock trading service.
Scout Finance - Free finance app that's like having a Bloomberg in your pocket. Download:
Contora - Alternative data on the companies activity on the web for retail traders
Cappio - Stock research that isn't overwhelming
Stockflare - Stockflare helps anyone pick stocks, easily. Investing doesn’t have to be complicated.
StockDock - Live stock prices right in your macOS Dock