Terralux SDG released three utilities as part of the SuckerPunch Pack 1;
Find/Replace Properties – “You can search for a[n object custom user] property, remove it, replace it with another one, or write it to all selected objects.”
SkinSP – “Basically, this modified Skin allows you to have non-circular envelopes. You can move any of the envelope’s 4 control points individually.”
User Properties Editor – A convenient user properties editor.
Download SuckerPunch Pack 1.