ActivePerl is a distribution of Perl from ActiveState (formerly part of Sophos) for Windows, Mac OS X, Linux, Solaris, AIX and HP-UX.
ActivePerl is an ActiveState's precompiled, supported and quality-assured Perl distribution, available for Windows, Linux, Mac OS X, Solaris, AIX, and HP-UX.
A free edition with only community support is available, as well as a supported Business and a Enterprise edition.