"Mike's Magic Matrix" bitmap shape editor?

In a couple issues of Apple Assembly Lines from 1982, I found references to a "Mike's Magic Matrix" tool that was under development by Mike Laumer, frequent contributor to the newsletter and author of the FLASH! Integer BASIC compiler.  It sounded like Mike's Magic Matrix was a bitmap shape/sprite editor tool.  Development soundedto be pretty far along, as the author indicated they he had only a little more adjusting to do and a manual to write, but aside from these references in Apple Assembly Lines, I haven't been able to find anything more on it.  Anyone have any information?

On that topic, does anyone know of a good bitmap shape editor for the Apple II?  (Note: bitmap shapes/sprites, not vector shapes)