ActiveState Tool Corp.
Providing a Win32 Perl-port, Perl for ISAPI, a graphical Win32 Perl-Debugger and other professional tools for Perl developers.
Gurusamy Sarathy's binary distribution of Per
The official Perl port for Win32 at CPAN.
IndigoPerl
A binary build of Perl 5.6 for Win32 with an integrated Apache webserver for testing and developing CGI scripts.
Intergraph port of Perl 4.036 for NT 3.5
An older (it's not Perl 5!) Perl 4 port.
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.