RFI

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Alongside tweaking the very excellent, though under-used, perl debugger and contributing to the voluminous and also very useful perl documentation, I've written a number of CPAN modules:

Acme::Debug
File::Data
Mail::Vacation
Oracle::Debug
Oracle::Trace

I'm also an occassional co-maintainer of Michael Schwern's excellent core Test::More module, (for my sins).