People often ask about combinations of gnuplot [L1 ] and Tcl; in fact, archives from the comp.lang.tcl newsgroup pertaining to gnuplot are quite extensive [L2 ]. Perhaps the most impressive marriage of the two is UniGNUPlot [L3 ], which makes for quick development of useful graphs:
"Just with simples 'click' and scroll bars, you have a good graphic in seconds, ready to insert in the document waht you want or directly to the printer..."