Robinhood - Free stock trading service.
Raiz - Invest spare change automatically from everyday purchases into a diversified portfolio.
Rally Rd. - Invest in blue-chip classic cars like stocks
Bamboo - Bamboo is a continuous integration and deployment tool that ties automated builds, tests and releases together in a single workflow.
Freetrade - Invest in stocks & ETFs for free, get started in seconds.
Alpaca Trading API - Simple REST API for commission-free stock trading