Perl/Tk (also known as pTk or ptk) is a collection of modules and code that attempts to wed the easily configured Tk widget toolkit to the powerful lexigraphic, dynamic memory, I/O, and object-oriented capabilities of Perl 5. In other words, it is an interpreted scripting language for making widgets and programs with Graphical User Interfaces (GUI).

A good place to get started is by running the "widget" demo that's installed with this package.