Professional timber framer and former programmer Clark Bremer has written "an extensive set of ruby plugins for SU specific to the mortise and tenon work we do", and has generously shared his work on his site: Northern Lights Timber Framing.
See Timber Frame Design using Google Sketchup for information.
The link Jim posted leads to the main page of my site, which you are welcome to visit, but the plugin stuff is on this page, and is not linked from the main page:
ReplyDeletehttp://www.northernlightstimberframing.com/su
CB