You can find all of the modules that are installed on a system by firing up CPAN like so: perl -MCPAN -e "shell"
Then at the prompt typing in: "autobundle" which will produce output like below example

Package namespace installed latest in CPAN file
Acme::Buffy undef 1.3 L/LB/LBROCARD/Acme-Buffy-1.3.tar.gz
Algorithm::Diff 1.15 1.15 N/NE/NEDKONZ/Algorithm-Diff-1.15.tar.gz
Algorithm::DiffOld 1.1 1.1 N/NE/NEDKONZ/Algorithm-Diff-1.15.tar.gz

Autobundle will write all this info to a file which you can later peruse. Once you have the list of modules then will want to hit search.cpan.org for the docs.

cheers

JSchmitz