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 very quick development of useful graphs: "para que con simples clicks y barritas deslizadoreas puedas tener una buena gr�fica en segundos, lista para insertarla en el documento que deseas o directo a la impresora."