Marathon Shape Editors

Marathon Shape Editor (MSE) - Pretty simple to use and gets right to the point. Not many functions beyond copying & pasting are available. Supports CLUT editing

Current Version: 1.2b
MSE was found at: AMUG, America Online
ftp://ftp-2.amug.org/contrib/marathon/shape-editors/marathon-shapes-editor-12b.hqx

Marathon Shape Installer (MSI) - Although more advanced than MSE, it crashes a lot more. Supports shape animation. Still in beta stages. 

Current Version: 2.0b1
MSI was found at: AMUG
ftp://ftp-2.amug.org/contrib/marathon/shape-editors/marathon-shapes-installer020b1.bin

Pfhred - Although it is also still in development, Pfhred seems to be the furthest along among all of them.  It features shape animation, sophisticated coordinates, clut editing, and more

Current Version: 1.2
Pfhred was found at: AMUG, Info-mac
ftp://ftp-2.amug.org/contrib/marathon/new/phred-12.hqx