 Maxima frontend Xmaxima is written in TCL/TK.
 <ul>
<li><a href="https://tcl.tk/">TCL/TK Website</a></li>
<li><a href="https://tcl.tk/software/tcltk/license.html">TCL/TK license</a></li>
</ul>
<h2>Gnuplot</h2>
Gnuplot is a portable command-line driven graphing utility. Gnuplot is used for 2D and 3D plots in Maxima.
<ul>
<li><a href="http://gnuplot.info/">Gnuplot website</a></li>
<li><a href="https://sourceforge.net/p/gnuplot/gnuplot-main/ci/master/tree/Copyright">Gnuplot license</a></li>
<li><a href="http: