The short answer is No, there is no native version for Windows 3.1 or Mac/Unix/Linux Operating Systems.
The long answer is Yes, there are work around to run NJStar WP on those OS.
- On Windows 3.1, you can run NJStar CWP for DOS and NJStar JWP for DOS.
- On Max OS X, you can install the latest NJStar WP directly by downloading from this link.
- On Linux OS, you can install the latest NJStar WP with the help of CrossOver for Linux, or using the free Open Source WINE.