for SBCL (as well as for free Common Lisp in general) through
his CLiki website.
+Robert E. Brown:
+ He has reported various bugs and submitted several patches,
+ especially improving removing gratuitous efficiencies in the
+ standard library.
+
Cadabra, Inc. (later merged into GoTo.com):
They hired Bill Newman to do some consulting for them,
including the implementation of EQUALP hash tables for CMU CL;