Another interesting alternative is HTML::Tree. There's an old version on CPAN, but I don't know why the author doesn't put the new version there. It's a module that allows you to create templates kind of like HTML::Template except that the template is 100% valid HTML, thereby completely separating your code and presentation.

Update: Hero Zzyzzx is right, HTML::Template could be made valid HTML, but then your template is even uglier than before. And viewing the file in a browser, you have blank areas where data would go (unless you actually run the 'program'), whereas with HTML::Tree you can view real sample data (in a WYSIWYG sort of way).