It doesn't matter what your application is written in. C, Python, Perl, Bourne Shell or Intercal are just fine.

In *NIX you consider what it is written for. Chose /opt or more often /usr/local as bases, if the application is simple, just drop it there. If it needs lots of executables or lots of data, create another subdirectory there. That's all. On other platforms, there are other habits.

I'd expect others not to mix their modules with the system-wide Perl installation, unless they install directly from CPAN - or with the new perl's core =). But that's just my way of expecting it to be.

Cheers, Sören