NodeBox 3 (free)
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Absolutly astonished!
Only default works only on 2D!
you can export in SVG and PDF
Other marvelous thing: you can animate any parameters and save animation in some formats!
http://www.youtube.com/watch?v=qfBzpPTpDPc
Here with only 2 Nodes!
So here import inside Moi3D + extude for have 3D!
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Thank you for posting this (and all the other stuff) Pilou. I am surfing on internet a lot and sometimes I find something special. I am amazed, surprised and curious how you can find al this freeware. You brought me to hours (weeks
) of entertainment already. 
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