Do you find your mixes flat, narrow, weak, one-dimensional? You might want to try this.
A free VST effect which allows you to enter the "loudness wars" giving your mix punch, volume, and width - without increasing the peaks.
OK - overused, anything like this can rob your mix of dynamics, but I really like this one. It achieves quickly and effectively what would take me a fair bit of fiddling with equalisation, compression, and stereo width plug-ins.
The interface is a bit quirky but clear enough. I suspect if you are a pro then you would want the control of individual effects, however for me ... this one stays in my VSTPlugins folder.
Stable. And I can't mark it down for presets (it needs none) nor documentation (needs none) ... and customer support not really applicable for a freebie.
This is an EQ (available in any DAW), a Mid-Side gain control (available in numerous free plugins, but this time without exact figures) and a waveshaper with one preset. Packed, granted, in a nice-looking UI.