This modern days...

Cheaper technology has launched the possibilities of Indie filmmakers as well as Home Recording Studios up to the
upper limits in quality. However, no creative craft will ever be converted into something as simple as pressing a button
or a Plug-in. Great equipments makes our life easier and help us judge better, but there is no "Magic" piece of equipment
for anything.

The most "Essential" Plug-in of all is your input!.
Those artistic and aesthetic decisions are the back-bone for any technical improvement.