Regarding the "2021" in your query, could you please provide more context or clarify what you mean by "2021"? Are you looking for information specific to the 2021 version of LVSim or a 2021-related feature?
: Many high-quality, open-source alternatives exist for various software applications.
: NI (National Instruments) offers special versions of LabVIEW for students and teachers at a lower cost. These versions are perfect for educational purposes.