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
DataSpark - Get access to exclusive hedge-funds stock research, for free
Stonksfolio - Gain insight into the performance of stock & ETF investments
Jika.io - Invest and learn with Jika. The investing platform built by retail investors, for retail investors!