Robinhood - Free stock trading service.
KOT4X - KOT4X is an online platform for Forex trading, Crypto, and CFD Broker that offers a wide range of tradable assets, including Forex, Cryptocurrencies, Gold, and Oil.
invstr - Investing for everyone (with fantasy $$$)
EagleFX - EagleFX is an online forex and crypto broker that offers competitive spreads, fast execution, and 24/7 customer support.
M1 Finance - M1 helps you manage your money by automatically putting it to work in a customizable portfolio
SimpleFX - SimpleFX is a powerful CFD trading platform that enables you to trade a variety of financial instruments, including stocks, commodities, indices, and currencies.