What i like in Unity , is that you can make tools integrated in the editor directly and easily
It can be a new panels or tools and framework to manage things for you.
For example the last one is a Decal Framework !
Some Video :
Video Decal Framewok What is great , is thate the decal can be animated
like blood or some paint color that falls on a wall !
I'm not sure if it is usefull , specially when you play some
FPS , where you don't stop to run and shoot all the time, without taking time to look at something
Anyway great framework among some other ones !
For people interested here is the thread :
Decal Framework