Thanks a lot for so many kind suggestions.

By the way, and if you don't care a little naïf Mediation here, while I started to use Twig, I thought it would be useful to the CPAN users a competition between the modules that eventually perform similar tasks. Although CPAN (somewhere) recommends the user should only submit modules which aims are not yet covered by other even accepted module, I think people tends by several reasons to bypass the procedure of sending suggestions to older authors. I think this is not bad, but an objective weighting method could do the job of choosing the better one easier.
Kwalitee cares only about - let’s say - formal requirements, or syntactic as opposed to semantic behaviors. The *.t framework only guarantees the module will not fail in your machine. So, we don’t have a real rating system. (If I’m totally wrong, please let me know).
A simplistic approach to such semantic competition between modules able to do the “same” job could be to make a bench mark for each module on the same tasks. Several input sizes could be used to accomplish a detailed description. Some kind of metadata like w3c OWL would need to be attached to the doc of the modules for making possible the automatic creation of input and scripts. Etc. What do you think?