ActiveState Tool Corp.
Providing a Win32 Perl-port, Perl for ISAPI, a graphical Win32 Perl-Debugger and other professional tools for Perl developers.

Qub Group
Offering YeP-perl a Cygwin-Perl-port and DBI:DBD ODBC, Oracle, mSQL, perl5 with GUI, perl5 for Win32 plug and play distribution. perl5 modules, extesions and projects, Visual perl GUI debugger environment.

Intergraph port of Perl 4.036 for NT 3.5
An older (it's not Perl 5!) Perl 4 port.

IndigoPerl
A binary build of Perl 5.6 for Win32 with an integrated Apache webserver for testing and developing CGI scripts.

Gurusamy Sarathy's binary distribution of Perl
The official Perl port for Win32 at CPAN.