quantra - A public API for quantitative finance made with Quantlib
Ellevest - An investing platform built for women
Gekko Plus - A tool that helps you invest smarter
Richie Invest - An app that lets you invest with your friends
QuantConnect - QuantConnect provides a free algorithm backtesting tool and financial data so engineers can design algorithmic trading strategies. We are democratizing algorithm trading technology to empower investors.
Robinhood - Free stock trading service.