Perl

From AJS.COM

Perl is an open source programming language originally created by Larry Wall . It combines procedural, functional and object-oriented programming techniques and presents many tools which come from the rich tradition of Unix utility programming and scripting.

Perl 6

Perl 6 is actually a ground-up reimplementation of the langauge. The major features of Perl 6 are:

Data typing such as my Int $i = 4;
Named and typed parameter passing
A much more robust object system which can more easily support most modern OO concepts
A new regex engine which uses "rules" to build "grammars" as powerful as the old Parse::RecDescent, but much easier to use.
More functional programming concepts as well as fully functional, Lisp-like macros.

Perl 6 is currently in its early stages, but if you wish to try it out, check out pugs , a prototype implementation using Haskell, or v6 , an implementation in Perl 5.