Physics Model Editors

Physics Model Editor - The first of the two. Comes with extensive docs, and the author will also help you out if you e-mail him.

Current Version: 1.1
PME was found at: AMUG, America Online
ftp://ftp-2.amug.org/contrib/marathon/misc-editors/physics-model-editor-11.bin

Playsets - Originated on E-world. Although easier to use than Physics Model Editor, there are less values you can control. Playsets reminds me of those Face-tracing books where you can take different heads and draw them with different ears, eyes, mouths, etc.

Current Version: 2.0
Playsets was found at: AMUG, America Online, E-world
ftp://ftp-2.amug.org/contrib/marathon/utils/play-sets-20.bin