Robinhood - Free stock trading service.
Alpaca Fractional Trading API - Commission-free API to trade & invest for as little as $1
Genuine Impact - Find your next great investment idea
Richie Invest - An app that lets you invest with your friends
Penny - Penny is a personal finance app that takes the pain out of keeping track of your finances.
Freetrade - Invest in stocks & ETFs for free, get started in seconds.