(Updated) The modifier has been released. You can find the download link on the Vimeo page below.
Another MCG by Ishak Suryo, this time for stacking meshes on top of the current mesh, allowing to create models in a non-destructive way. Watch the preview video on Vimeo.
Hmm iToo Clone is still better but this will be a very useful script as well. Shame you never just released the script instead of making the users have to build it and save out as a script.