Available for download, iZotope's Neutron is a bundle for mixing comprising a compressor, equalizer, exciter, transient shaper, and limiter. However, iZotope has gone beyond the usual mixing bundle here to offer intelligent tools that help you quickly identify potential problem areas in a mix and solve them expeditiously, often within a single instance of the plugin across multiple tracks. Furthermore, modules such as Neutrino are provided to help maintain the clarity, focus, and separation of individual tracks across a mix.
Particularly useful for mixing engineers is the masking meter, which visually identifies which frequencies in a given track are being overshadowed by other elements of the mix, and allows you to make the necessary adjustments to compensate. In practice, this is a suitable tool for quickly mitigating problems between kick drums and bass elements, guitars and vocals, guitars and keyboards, and more.
Also integral to Neutron is the Track Assistant, which listens to incoming audio signal and generates a custom, preset module chain based on what it analyzes. It is not a panacea, but rather, creates a suitable starting point for each individual instrument from which you can further explore creative possibilities.
This plugin is available for Mac and Windows platforms, and while there is no standalone version, you can operate it within VST, AU, AAX and RTAS formats.