This tool will display the polygon and vertex count for objects in the hierarchy or the project window. The information windows can be docked, scaled and moved to where ever you like.

Features
⇒ Displays the total (and individual) amount of Polygons and vertices.
⇒ Select multiple game objects, event nested game objects.
⇒ Select from hierarchy or project folder
⇒ Can display a top 10 list of game objects using the most polygons (from selection).
⇒ Customizable thresholds, define amount and color.

Models used in the screenshots are NOT provided with the asset.