Static electricity discharge, what gets transfered?
When a non conductive object is charged with negative charge and a
  second non conductive object with positive charge approaches, there
  will be a discharge or transference of charge from one object to
  another, Is that discharge actual electrons going from one object to
  the other? or is it only "charge" as in energy flowing from one to the
  other?


It is electrons that flow from one object to the other and electrons have a charge of 1.602e-19 coulombs so you can say the answer is both. Also don't interpret charge flowing as energy flowing - the two don't numerically equate.


  To further clarify my question: imagine a lightning striking the
  ground, is the electric arc ( the lightning itself) a bunch of
  electrons going from the clouds to the ground?


The electric arc is current flow which of course is flow of charge