--First off, I have never used this one personally.  But IMHO, it's
along the same line as Google Sketchup (3D graphicals w/ Ruby plugins).

   I used that Google Sketchup a bit, quite awesome !!!  If I'm not
wrong, in both cases they are taking Ruby--the language--to the next
step, and developed it further into a DSL (Domain Specific
Language)--that is, at least, what people have always talked about...

   Please feel free to correct me if I'm wrong.  Have a good day !!!

Best Regards,
Nik

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