Perl Core Development
Perl for the next 27 years
Perl 5 - Production-ready, under active development
Get involved: http://dev.perl.org/perl5/
Perl 5.22.2 is the current stable version of Perl. Perl 5 is actively maintained and developed (git repository) by a large group of dedicated volunteers. Perl 5 will be developed and maintained for many years to come.
Strawberry Perl is a distribution of the Perl programming language for the Microsoft Windows platform. While most other distributions rely on the user having software development tools already set up to install certain Perl components, Strawberry Perl ships with the most commonly used tools pre-configured and packaged.
The Perl 6 project is a new language. Perl 5 and Perl 6 are two languages in the Perl family, but of different lineages. Perl 6 is not intended as a replacement for Perl 5, but as its own thing - and libraries exist to allow you to call Perl 5 code from Perl 6 programs and vice versa.
Rakudo Perl is an implementation of the Perl 6 specification that runs on multiple backends, including MoarVM and the JVM.
MoarVM is a virtual machine built especially for Rakudo Perl 6 and the NQP Compiler Toolchain.