Ren'Py is a visual novel engine – used by thousands of creators from around the world – that helps you use words, images, and sounds to tell interactive stories that run on computers and mobile devices. These can be both visual novels and life simulation games. The easy to learn script language allows anyone to efficiently write large visual novels, while its Python scripting is enough for complex simulation games. Ren'Py is open source and free for commercial use.

 "Ren'Py Visual Novel Engine è un software libero che facilita la creazione di visual novel, una forma di narrazione mediata dal computer. Il termine "Ren'Py" è un portmanteau di ren'ai (恋愛^?) la parola giapponese per "amore romantico" (un elemento comune di giochi realizzati con Ren'Py) e Python, il linguaggio di programmazione utilizzato dal software." (da Wikipedia).

Ren'Py