This post simply lists simulation software to be added to the ‘Simsoftware’ catalog.

https://fmi-standard.org/ Not a software but a standard

https://calculix.de/

https://openradioss.org/

https://awslabs.github.io/palace/stable/config/config/

https://su2code.github.io/download.html

https://gmat.atlassian.net/wiki/spaces/GW/overview

https://lcgamboa.github.io/picsimlab_docs/stable/

https://www.gridlabd.org/

https://github.com/newton-physics/newton

https://pyams.sourceforge.io/

https://github.com/yrlu/quadrotor

https://solarnetwork.net/

https://tellurium.analogmachine.org/

https://sourceforge.net/projects/kulkijg/

https://github.com/Sidd0OP/A-Simple-Game-About-Scheduling-Trains

https://sourceforge.net/projects/popppy/

https://github.com/LabRPS/LabRPS

https://physicell.org/

https://www.hyperfit.cz/screenshots.php

https://acousto.sourceforge.net/

https://octave.org/

https://a-b-street.github.io/docs/tech/trafficsim/discrete_event/index.html

https://omnetpp.org/