Из описания:
PIL is a Platform Independent Language. It is a language that has two main uses:
As a target language for compilers (particularly domain-specific language compilers) to abstract from specific software platforms
As an implementation language for libraries/applications that need to be run on multiple software platforms. This works best for applications relatively independent on platform-specific libraries and frameworks.

PIL can currently generate code for:
Java
Python
PHP 5
Back-ends under development:
Objective-C
Planned back-ends:
C#
Javascript
Smalltalk?

здесь

Оффтопик: какие-то странные глюки со вставкой url. Правильно удалось поставить только со словом "здесь", с "PIL" описание и ссылка меняются местами. Почему?