Why not go farther back in time, to BBN BitGraph? :-) There's a DVI previewer and netpbm converter for it, gnuplot supports those as well -- http://www.ctan.org/pkg/dvibit, http://netpbm.sourceforge.net/doc/pbmtobbnbg.html and http://www.gnuplot.info/docs_4.2/node423.html