I know Tk is no longer active but I do like its easability.

Tk is still active, it just dosn't change much. :-)

What you are looking for is Tk's hypertext. See Insert something like a hyperlink in a Tk Text widget for a few basic examples.

To launch the web browser when clicking on a hypertext link, use the code below in the callback. You need to fork it off to avoid blocking the event loop.

#!/usr/bin/perl
use warnings;
use strict;

my $linkurl = 'http://google.com';
#my $linkurl = 'linux-tips.html';
#my $file = 'links_from_HTML.html';

#my $command = "firefox $file";
# if(fork() == 0){ exec ($command) }  #works

#system( $command );

#external url
my $command = "firefox $linkurl";
if(fork() == 0){ exec ($command) }
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If you don't want to use HyperText, you can put the callback into a Button widget.

You can also do it very nicely on a canvas, the canvas allows you much flexibility. The following example could be enhanced, to have Enter and Leave bindings on the weblink tag, and to maybe change the cursor to a hand or pointer when over the links.

#!/usr/bin/perl
use Tk;
use strict;
my $w=20;
my $x=0;
my $y=0;

my %nums = (
   0 => ['black','yellow'], 
   1 => ['yellow','black'], 
   2 => ['white','green'],    
   3 => ['green','white'], 
   4 => ['grey','red'], 
   5 => ['red','grey'], 
   6 => ['blue','white'], 
   7 => ['white','blue'], 
   8 => ['orange','grey45'], 
   9 => ['grey45','orange'], 
);


my $mw=tkinit;
my $c = $mw->Canvas(-bg=>'white')->pack;

for (0..9) {
 my $item=$c->createRectangle($x,$y,$x+20,$y+20,
             -fill=> ${$nums{$_}}[0],
             -tags => ['weblink']
          );

my $text = $c->createText($x+10,$y+10,
           -anchor=>'center',
       -fill => ${$nums{$_}}[1],
       -text => $_,
           -tags => ['weblink']
          );
      
      $x+=20;
}


my $text1 = $c->createText(100,100,
            -anchor=>'center',
        -fill => 'black',
        -font => 24,
        -text => 'http://google.com',
            -tags => ['weblink']
           );
      
   


$c->bind('weblink', '<ButtonPress-1>', 
            sub { 
                  print "launch your url\n"; 
            
                  my $linkurl = "http://google.com";
                  my $command = "firefox $linkurl";
                  if(fork() == 0){ exec ($command) }
            
            
                 } );



$mw->Button(
    -text    => "Exit",
    -command =>sub{ exit },                       
      
    )->pack;
  
MainLoop;
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