He made a lot of progress toward getting SBCL to be bootstrappable
under CLISP.
+Perry E. Metzger:
+ He ported SBCL to NetBSD with newer signals, building on the
+ work of Valtteri Vuorikoski. He also provided various cleanups to
+ the C runtime.
+
Gerd Moellman:
He has made many cleanups and improvements, small and large, in
CMU CL (mostly in PCL), which we have gratefully ported to SBCL. Of