PerSense for Windows
is now available for free download

30 years ago, PerSense for DOS was hailed as the World's #1 financial calculation software. This package has features and computational power that have never been duplicated, and thousands of users continue to prefer it, even in its old format.
→   compatible with all versions of Windows  

PerSense for DOS includes some features not in the Windows version,
notably actuarial calculations involving lifespan

You can run PerSense for DOS on any Windows, Macintosh, or Linux machine in a "DOS box". DOSBox is a free, open-source program which you can download from