I have made a crude wget based text-and-software-only mirror of the xibalba M100 software site that came up on the list earlier this week. Out of an abundance of laziness I did not do the work required to bring the graphic images on the page over, but the text, most of the software, and software descriptions are present. A handful of files were 404 on the WayWayBack mirror so they are also missing here.
http://public.nachomountain.com/mirrors/www.xibalba.com/website100/software.html While I am not particularly concerned that the copy on archive.org will go away, it seemed prudent to put these eggs in an additional basket.
