Robinhood - Free stock trading service.
FXCM - FXCM is a UK-based Forex Capital Market that offers forex and CFDs trading and a part of Leucadia that is a diversified holding company.
invstr - Investing for everyone (with fantasy $$$)
OANDA - OANDA is an advanced forex and broker trading platform that helps you in currency data, exchange rate services for the investors and organizations.
M1 Finance - M1 helps you manage your money by automatically putting it to work in a customizable portfolio
FXOpen - FXOpen is a forex and cryptocurrency trading solution that manage the PAMM account and provides all backup with analytics and customer support.