If you cannot find a suitable binary you can try to compile the source code: jsplot-1.1.17-src.tar.gz or jsplot-1.1.17-2.src.rpm. However be warned that this is a big program that relies on a number of libraries. So compiling it may take time and require some programming experience.

Some software that is needed to build jsplot is collected at this location: ftp://ftp.grs.de/pub/jsplot/libs The libraries are normally present on Linux but you will have to get Motif.