DataSpark - Get access to exclusive hedge-funds stock research, for free
Robinhood - Free stock trading service.
Scout Finance - Free finance app that's like having a Bloomberg in your pocket. Download:
Alpaca Fractional Trading API - Commission-free API to trade & invest for as little as $1
SparkFin - Learn the markets for free, profit forever.
Richie Invest - An app that lets you invest with your friends