Isol8 plugin is an advanced mix monitoring tool, that splits audio into 5 adjustable frequency bands.
These 5 bands can be soloed or muted individually. This will help you to concentrate on certain frequency ranges during the mixing and mastering process.
Isol8 is originally designed to be used on the master track, but it can also be used on individual audio track buss.
Isol8 key features
The ISol8 requires Mac OS X 10.5 or newer and supports windows as well.
Isol8 introduction video
Download ISOL8 here.