GNU Guile

GNU Guile is the preferred extension system for the GNU Project and features an implementation of the Scheme programming language. Its first version was released in 1993. Beyond large parts of the Scheme standards, Guile Scheme includes modular extensions for many programming tasks. For extending programs, Guile offers a library called libguile that lets the language be embedded in other programs and integrated closely through the C API. New types and subroutines defined through the C API can in turn be made available to Guile itself. The name Guile stands for GNU Ubiquitous Intelligent Language for Extensions. The Programming Language Database credits Aubrey Jaffer, Tom Lord and Miles Bader as creators and lists Scheme, Emacs Lisp, C, Tcl and S-expressions among its related entries.