TradeStation - Whether you trade stocks, ETFs, options or futures, TradeStation’s award-winning tools and...

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.

Questrade - Questrade IQ Mobile is everything you need to trade stocks - right in the palm of your hand.

Quantopian - Your algorithmic investing platform

Merrill Edge - Merrill Edge is a brokerage platform that helps in investing, provides advisory consultations, and other services.

quantra - A public API for quantitative finance made with Quantlib