There are three different things that can be referred to as "Willow Script," as found in the search results:

1. The Willow Script font: This is a thick, curly script font that includes a transparent shadow within each character. It is available for purchase on Creative Market, and can be downloaded for personal use for free from FontGet.

2. The script for the movie "Willow": This is the screenplay for the 1988 fantasy film "Willow," directed by Ron Howard and written by George Lucas. The script can be found on the Internet Movie Script Database.

3. The programming language: Willow is a simple interpreted programming language built in Python. It is a weakly-typed language, and a language package to provide syntax highlighting for the Atom text editor is available on GitHub. The language is designed to be easy to use and understand, and includes features such as file input/output and random number generation. Examples of test functions can be found in the GitHub repository.