I don't know any software. Google didn't come up with something either. Guess this is too simple a problem. It should be about 30 lines of code if you wrote it in a scripting language. You could also create a LibreOffice spreadsheet to do that. Shouldn't be terribly difficult.

Edit 1:

Below is a quick and dirty perl script I coded. You should be able to modify it yourself. When you run it with perl nameOfTheScript.pl or make it executable with chmod u+x nameOfTheScript.pl and then double click it, it will look like in the picture above.

#!/usr/bin/perl

# © 2011 [email protected]. Use permitted under MIT license: http://www.opensource.org/licenses/mit-license.php

use Gtk2 '-init'; # relies on the gnome toolkit bindings for perl



$size = 1e5;   # fontsize in 0.001 pt (only god knows why)



sub randomizeLabel {   #### this does the actual randomisation

    $min = int($entry1->get_text);

    $max = int($entry2->get_text);

    $rand = int(rand($max-$min+1)) + $min;

    $diplabel->set_markup( "<span size="$size">$rand</span>" );

}

#### the rest is gui stuff:

$window = Gtk2::Window->new('toplevel');

$window->set_title('Random Integer Generator');

$window->signal_connect(destroy => sub { Gtk2->main_quit; });

$window->signal_connect(delete_event => sub { Gtk2->main_quit; });

$window->set_border_width(10);

$vbox = Gtk2::VBox->new(0, 5);   $window->add($vbox); $vbox->show;



$diplabel = Gtk2::Label->new;

$diplabel->set_markup("<span size="$size">0</span>");

$vbox->add($diplabel);          $diplabel->show;



$entry1 = Gtk2::Entry->new;     $vbox->add($entry1);    $entry1->show;

$entry2 = Gtk2::Entry->new;     $vbox->add($entry2);    $entry2->show;



$button = Gtk2::Button->new("Generate!");

$button->signal_connect(clicked => &randomizeLabel, $window);

$vbox->add($button);            $button->show;



$window->show;    Gtk2->main;

exit 0;

Edit2

ObsessiveFOSS asked me to include another generator for random numbers (as it is this script uses Perl's build-in one). You can see a sketch on howto do it in my other answer.