From Creatures Wikia
CobCom, written by Lee Gaiteri (a.k.a. LummoxJr), was one of the earliest editors for Creatures 1 COBs, along with Alexander Laemmle's COE. Hand in hand with BMP2SPR, it allowed people to create their own .COB and .SPR files for Creatures 1.
CobCom is available from The Norn Underground.