"Sun Solaris

Starting from Solaris 8 Perl 5 ships standard with Solaris. (Perl 5.005_03 with Solaris 8 (SunOS 5.8), SunOS 5.9 ("Solaris 9") includes Perl 5.6.1, SunOS 5.10 ("Solaris 10") includes Perl 5.8.4 (plus a lot of perl5-porters patches)"

I'm quoting from HERE which is where you can download it as well