iZotope’s Neutron and Ozone are incredible for mixing and mastering (respectively).
They analyze either the track (Neutron) or the whole mix (Ozone) and calculate optimal EQ and channel effects like compression, limiting, etc. They aren’t perfect and generally you have to tweak what they come up with, but it saves tons of time.
In addition to the calculated static EQ, based on the analysis it locates bands that need dynamic adjusting, and applies changes to the EQ in real time in the song, like an intelligent side-channel.
It’s freaking awesome. Here’s Ozone dynamically adjusting the EQ of the whole mix, in real time: