<ul>
<li><a href="http://www.drgeo.eu/">drgeo</a> and
-<a href="http://edu.kde.org/kig/">kig</a> to do constructions in planar
-geometry
+<a href="http://edu.kde.org/applications/all/kig">kig</a> to do
+constructions in planar geometry
<li><a href="http://www.geom.uiuc.edu/software/download/kali.html">kali</a>
to discover symmetry groups (the so-called wallpapers and frieze