VisSim 9.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The default filenames for the program's installer are Netfloat.exe, VisSim v8.0A.exe, VISSIM.exe, vissim0.exe or Vissim32.exe etc.
This free program is an intellectual property of Visual Solutions, Inc. The software lies within Education Tools, more precisely Science Tools.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. You can set up this free PC program on Windows XP/7/8/10/11 32-bit. The most popular versions among the program users are 9.0, 8.0 and 7.0.
From the developer:
VisSim is a block diagram language for creating complex nonlinear dynamic systems. You can choose to display your response in 2D or 3D plots, gauges, bar charts, meters, digital readouts, and even 3D animated scenes. All are driven in real time using the VisSim engine.
You may want to check out more software, such as PTV Vissim Student or NuGraf, which might be similar to VisSim.