SLIK is a library of lightweight user interface widgets and components, written in Common Lisp. It uses the X window system through CLX, and includes dispatch and event handling. The source code is available here as a gzipped tar file, version 2.2. A programmer's reference manual (PDF) is also available.
Please observe the copyright notices contained in the documentation. SLIK source code is provided with NO WARRANTY of any kind. It is licensed under the terms of the Lisp Lesser GNU Public License, known as the LLGPL. The LLGPL consists of a preamble (see above URL) and the GNU Lesser General Public License, or LGPL. Where these conflict, the preamble takes precedence. SLIK is referenced in the preamble as the "LIBRARY."
This software is UNSUPPORTED. However, the author may be able to provide some assistance via email. Your input is welcomed, as it will help make improvements in future versions. The author may be contacted by email. If you are sending a bug report, please specify the SLIK version, the Allegro CL version, the operating system version (which Linux distribution and release number), and any and all other information you can provide. It is particularly useful if you can send a traceback using the Allegro CL :zoom command, with the verbose option, :zoom :verbose t.