Hi,
1. The following link is on the EMC2 license is broken:
http://www-c.inria.fr/gamma/cdrom/www/emc2/copyright.htm
It seems that a replacement is:
http://pauillac.inria.fr/cdrom_a_graver/www/emc2/copyright.htm
2. Also this is broken for Scilab:
http://www.scilab.org/legal/license.html
Current versions of Scilab now use a free license (CeCILL) and now link
to that. One page containing the old Scilab license text is:
http://www.worldlii.org/int/other/PubRL/2009/51.html
3. This is broken for the GLX Public License:
http://www.sgi.com/products/software/opensource/glx/license.html
One page that contains this license text (along with text of some other
licenses) is:
http://www.x.org/archive/X11R6.8.0/doc/LICENSE3.html
Of course, another way to deal with the broken links is use as you
have before old URLS stored by
archive.org
Thanks,
Bake