suzumushi has released SpeakerObjects, a free binaural VST3 plug-in for Windows.
Here's what they say:
SpeakerObjects specializes in binaural reproduction of stereo speaker-based sound fields.
Headphone monitoring of stereo sound that is assumed to be play-backed from speakers degrades sound localization. Similarly, stereo speaker sound mixed by headphone monitoring leads to sound imbalance. In these cases, it is necessary to compensate for the acoustic characteristics of the listening room during monitoring or mixing, which is supported by SpeakerObjects.
