With this software, you can set ranges for various circuit components ... However, we appreciate the free release of this powerful simulator that can give LTSpice a run for its money.

That’s the reason for the vast versions of SPICE available now decades after the original was released, not all of which are as open or free as we might like. Qucs is a GPL circuit simulator.

It is a good logic gate simulator that lets you calculate the truth tables from logic circuits as well as boolean expressions. SimpleSolver is a free truth table calculator software for Windows 11/10.