Perl

Perl has built-in Unicode support, mostly. Sort of. From perldoc:

• perlunitut – Tutorial on using Unicode in Perl. Largely teaches in absolute terms about what you should and should not do as far as Unicode. Covers basics.
• perlunifaq – Frequently asked questions about Unicode in Perl.
• perluniintro – Introduction to Unicode in Perl. Less “preachy” than perlunitut.
• perlunicode – For when you absolutely have to know everything there is to know about Unicode and Perl.