You can use the Tk interface to the Perl debugger: 
perl -d:ptkdb yourprog.pl

[download]
It has an expression-browser.

update: ptkdb can be foung in the Devel-Package on CPAN.

In reply to Re: Where can I get something to browse complex data structures via a GUI? by busunsl
in thread Where can I get something to browse complex data structures via a GUI? by szap

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