CLIM offers a variety of tools and features for creating portable Lisp applications. One of these techniques, made possible by the adaptive toolkit, is the ability to transform the look and feel of a given application easily. Thus, an application can take on Motif characteristics when running on a Unix workstation, can have a Microsoft Windows look and feel when running on that platform, or can be presented in a different customized manner.
Common Lisp Interface Manager 2.0 User's Guide - 20 Sep 2011