X11 Common Lisp client library for SBCL

 CLX is a low-level X11 client library for Common Lisp. CLX is to
 Lisp what Xlib is to C.
 .
 This version of CLX originated in a CMUCL distribution, was modified
 in order to make it compile and run under SBCL and was enhanced with
 some features from other CLX implementations. It should work with
 SBCL, CCL, ECL and CLISP, despite its package name.