Looking for a (F)LOSS Stock Trading software ideally without commission (but that doesn’t seem to be economically possible for a FLOSS?).

I want to propose the alternative to a friend, but i would also like to use it myself where i prefer to use scripts to calculate the risks of things i invest in while mixing it with random generator for fun. ^-^

Expected usecase

Superior alternative to robinhood https://robinhood.com/us/en/
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Thanks for any relevant suggestion ^-^