Good Software For EA Analysis?

Hello!

As the subject suggests. What is some good software that people use to test EA’s? Now that I can create my own ideas into EA’s I need software that can test them. What are people using? Is it free? What does it cost? How are you finding it?

There used to be one called DATFRA? Darwins Algorithic Trading something something something. Someone who went by the name of Darwin had it and it was very useful. Sadly it appears it is no longer available.

Thanks for any input!