WHS ProStation is the best entry level platform. It is suitable for beginners and advanced traders and can be used to trade CFDs and forex. In addition to the download version there is a web version and an iPhone version. WHS Prostation is free.
WHS FutureStation Nano is unique. It offers manual and (semi-)automatic trading of CFDs, futures and forex. No programming is needed. Strategies from respected sources are integrated in the platform. A small monthly subscription is due.
WHS MT4 or MetaTrader 4 has its followers due to the "Expert Advisors" strategies which can be loaded into it. It is less suitable for discretionary trading as functionalities are limited. WHS MT4 is free. The platform can be used for forex and CFD trading.
According to the manufacturer "The MetaTrader 4 terminal is a perfectly equipped traders workplace that allows to trade in the financial markets. It provides the necessary tools and resources to analyze price dynamics of financial instruments, make the trade transactions and, create and use automated trading programs (Expert Advisors)".