GNU's Ubiquitous Intelligent Language for Extension
This is version 2.0 of Guile, Project GNU's extension language library. Guile is an implementation of the Scheme programming language, packaged as a library that can be linked into applications to give them their own extension language. Guile supports other languages as well, giving users of Guile-based applications a choice of languages.
Homepage: https://www.gnu.org/software/guile/