There was a download of CVI Runtime Engine 8.5.1 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The common filename for the program's installer is cvi.exe.
The most popular versions among the program users are 8.5, 6.0 and 1.0. This PC program is suitable for 32-bit versions of Windows XP/XP Professional/Vista/7/8/10/11. CVI Runtime Engine lies within Development Tools, more precisely IDE. The actual developer of the free software is NI. We recommend checking the downloaded files with any free antivirus.
From the developer:
With your purchase of LabWindows/CVI, you received the run-time engine as part of your distribution. The LabWindows/CVI Run-Time Engine is necessary to run executables or use DLLs you create with LabWindows/CVI, and it must be present on any target computer on which you want to run your executable program. You can distribute the run-time engine according to your license agreement.
You may want to check out more software, such as Engineering Power Tools Plus Edition, FRED Optical Engineering Software or Engineering Power Tools, which might be similar to CVI Runtime Engine.