JGP is a GUI for gnuplot (http://www.gnuplot.info/).
It is made for all those who just love gnuplot but who found
that organizing a large number of datasets and plots from the command line is inconvenient.
JGP uses gnuplot as plotting engine.
I think its a great little app for someone that already knows gnuplot and just wants to throw in some data on a plot for a quick analysis. There're a few bugs here and there but overall its stable and convenient to use -- the key feature, imo, is the ability to pick one or a few plots from a (possibly long) list.
nice try However, the most important thing for gui to gnuplot is export of gnuplot script to file, and this is missing. Sure, there is some console preview but the long unformatted string for plot command including let's say 10-20 datasets is not what is expected.