Community Tip - Did you get called away in the middle of writing a post? Don't worry you can find your unfinished post later in the Drafts section of your profile page. X
The PlanetPTC video and the Mathcad sheet are here and here (a winter editing). In Pro/E here. See here too.
Theo Jansen's Step Foot Machine on Wolfram (Mathematica) site:
http://demonstrations.wolfram.com/ATheoJansenWalkingLinkage/
