Interactive Brokers: While not exactly lesser-known, Interactive Brokers is often favored by experienced traders for its low-cost trading and access to a wide range of global markets. It may not be as well-known among casual investors.
TD Ameritrade (thinkorswim): TD Ameritrade's thinkorswim platform is renowned for its powerful charting and technical analysis tools. It's particularly popular among active traders.
TradeStation: TradeStation offers a highly customizable trading platform with advanced charting and analytics. It's often used by traders who want to develop and test their own trading strategies.
