http://www.perlmonks.org?node_id=229272

Jaap has asked for the wisdom of the Perl Monks concerning the following question:

Holy Monks,

Are there any tools for checking perl code beyond what the compiler checks?
I am thinking of checking caveats like unused code, unused variables, redundancy, not checking return values of subs and system calls, etc.

If such a tool does not exist, what would you like to see in it if 'the community' would make one?