Logicly Product — Key =link= Free High Quality

You might be tempted by any free key, even a risky one, because you want “high quality.” Quality in a logic simulator means:

: A high-quality, free online simulator that allows you to generate circuits from truth tables and embed them into blogs. Logisim-evolution

Instead of risking "free keys" from third-party sites, the developer provides legitimate ways to use the software: