Some of the following EA builders are web-based, others require installation. MT4 builders are designed to generate customized Expert Advisors by compiling MQL4 or MQL5 code. Τhe following EA builders are offered for free / or provide a free-trial period and can be used for creating EAs on MetaTrader-4 and MetaTrader-5.
StrategyQuant (Backtesting & Optimizing EA Strategies).