Master no louder than -9 LUFS short-term at the loudest moments
(with True Peaks no higher than -1)
That's what Ian Shepherd says at least.
SimulAnalog guitar suite has a pretty decent Univibe free VST plugin.
The Lisp plugin is a free VST de-esser. So far I like it muchwise. I've never seen any evidence this thing was ever actually manufac...