I need suggestions on free 3DS Max 2013 64Bit plugins?

I'm not looking for anything too particular, just some plugins that help during modeling. I have a couple right now but i feel i can always use more. Please don't give me the "Google it" skit. I've done that already. I want suggestions from experienced users, even if you've tried it once and it worked. 64Bit only.

I have the following plugins already.

Greeble (an awesome free plugin that makes building-like shapes... Good for making city scenes)

Ghost Town (Better than Greeble. It actually makes city blocks and textures them, also adding trees, cars and other things. Pretty much an all in one city maker).