C4D;

Here is a C4D tutorial on making quasi-greeble meshes, along with a free plugin;
http://forum.3dfluff.com/showthread.php?threadid=82

Here is a plugin for C4D, called "structure", that is supposed to be a greeble-like plugin. I think you have to buy it;
http://www.plugincafe.com/download_browse.asp?downloadID=P080073017STRU01

AS

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