Advanced topics on Computing in Greek
Page intended to cover advanced topics in using Greek fonts. It provides numerous codeset conversion scripts in Perl for Greek.
http://www.hri.org/fonts/advanced/

CPAN : Lingua modules index
Collection of well over 100 linguitic modules for Perl. They cover a very wide range of functionnalities from English text readability calculatation (Lingua-En-Fathom) to JIS sorting for Japanese UTF-8 strings (Lingua-JA-sort-JIS).
http://www.cpan.org/modules/by-module/Lingua/

How to interoperate between UTF-8, UTF-16, and UTF-32
Ken Lunde illustrates with some Perl code how the various Unicode Transformation Forms can interoperate. This article was published in the IBM DeveloperWorks Unicode section.
http://www-106.ibm.com/developerworks/unicode/library/u-encode.html

Unicode modules for Perl
Various perl modules to help you handle Unicode data in your scrips (normalization, convertion, transliteration, collation and more).
http://www.cpan.org/modules/by-module/Unicode/