Maybe a free renderer can interest you :)

 From:  goney3
518.16 In reply to 518.13 
You're very welcome Joe :)
I know Rhino has an unfolding feature that many paper-model designers use. Though they have to add their own gluing tabs. There are a ton of Rhino-to-Paper tutorials on Cardmodels.net : http://www.cardmodels.net/

Form-Z also has a built in rapid-prototype unfolder (includes tabs) but I have never tried it out.
http://www.formz.com/products/formz/unfolding.html