From the about page: https://common-lisp.net/project/mcclim/main.html https://common-lisp.net/project/mcclim/main.html > McCLIM is a FOSS implementation of the

From the about page: https://common-lisp.net/project/mcclim/main.html https://common-lisp.net/project/mcclim/main.html > McCLIM is a FOSS implementation of the Common Lisp Interface Manager specification, a powerful toolkit for writing GUIs in Common Lisp. It is licensed under the GNU Library General Public License.