LivingCels

[Natasha]

Program Name: Livingcels for Window or Apple
Website: disabled pointed to Microscoft all the time (www.creaturehouse.com)
Current version: discontinued, was available as a download a few months ago and now disappeared from internet
Desired versions: any
Description: a 2D animation software using skeletal strokes

[Goslow]

It maybe a difficult find/then run was not it only released as a beta (windows) and then it required expression to also be installed and had an expiry date coded in.
The mac version maybe more obtainable/workable I havnt looked.