http://seasteading.org/ http://seasteading.org/ is an idea on similar lines by the free market libertarians and http://www.thezeitgeistmovement.com/ http://www.

http://seasteading.org/ http://seasteading.org/ is an idea on similar lines by the free market libertarians and http://www.thezeitgeistmovement.com/ http://www.thezeitgeistmovement.com/ for the more communist minded libertarians led by Jaques Fresco.