The Crease plugin allows you to apply a crease value to multiple selected objects at once (instead of changing each object's property value one at a time).
This is for all platforms. The source was written by Andy Colebourne of Inivis, I simply modified it to make a menu-ed script.
The Crease plugin is available at:
http://supercoldmilk.com/ac3dplug/crease.html
See all my plugins at
http://supercoldmilk.com/ac3dplug/index.html