CPAN LINK: Convert::Morse
CPAN ABSTRACT: Package to convert between ASCII text and MORSE alphabet.
Introduction:
This module caught my eye as yet another 'Cool Use For Perl', appealing to both the avid Perl Programmer and Amateur Radio Hobbyist inside me.
Functionality:
In a nutshell, Convert::Morse converts an ascii string to equivalent International Morse Code dots and dashs and visa-versa. In addition, the module contains a function to check and see if a particular ascii string "is morsable", convertable to a valid morse code string.
Demo Code:

#!/usr/bin/perl 
use strict;
use Convert::Morse qw(as_ascii as_morse is_morsable);

print as_ascii('.... . .-.. .-.. ---  -- --- .-. ... .'),"\n"; # 'Hell
+o Morse'
print as_morse('Perl?'),"\n";                # '.--. . .-. .-.. ..--..
+'
print "Yes!\n" if is_morsable('Hello Perl.'); # print "Yes!"
[download]

Bug(s) Found:
None immediately found with preliminary testing.
Module Author Noted Limitation:
Can not yet do Japanese code nor German Umlaute.

Final Thoughts:
With further tinkering I found this module to be quite useful in converting English text to valid dot-dash-spaces International Morse Code; indeed another Cool Use For Perl for both die-hard those who are both Die-Hard Perl Programmers and Radio Enthusiasts alike.
UPDATE:There is indeed only one International Morse Code recognized by International Treaty that does not include japanese or umlaute character sets; Thanks to theorbtwo for pointing that out.

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