A GUI toolkit for Common Lisp

What is McCLIM?

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.

You can access the McCLIM manual draft PDF if you want, but it’s still a work in progress. To reach the developers you may either write to the mailing list or on the #clim irc channel.


  • Mature yet modern CLIM II protocol implementation
  • Extensible GUI toolkit for applications
  • Sophisticated interface manager for Common Lisp
  • Portable between various Common Lisp implementations
  • Robust solution for creating end-user applications


Some external tutorials for CLIM may be found here: