The Connect surface tool by Dimitri.

[Dimitri]

Progress! This tool may be a very significant tool for many uses. Other than easily drawing geometrical shapes on objects and coloring or extruding them, it can be used -with the aid of a small group of other commands- as a good tool for producing new topology too.

There are some bugs in its workings as far as I detect in experimenting with it but I have no any conclusion yet as to when exactly they appear. When having a conclusion I will report it.