SimCloth : A Free cloth simulation Plugin for 3ds max 7,8,9,2009

ClothFX : An excellent Cloth Plugin distributed/Sold by Turbosquid and it is supposed to do really fast Cloth simulations.

SyFlex : Basically a Maya plugin now ported for 3ds max 9 also and seems that it is very capable too.

ClothReyes : The good old Cloth simulator…very popular plugin during the 3ds max 3,4,5,6 ..and it seems the Reyes is not interested in releasing the newer versions.