Refined Audiometrics Laboratory has released HDPHX, a Headphone Listening Enhancement for VST.
The HDPHX plugin can be used when mixing with headphones. It takes advantage of the Haas Effect to provide a delayed and attenuated cross-channel mix in each ear to present the sound that would be heard with a stereo speaker system with speakers placed at +/-30 degrees azimuth from front-center.
Visit Refined Audiometrics Laboratory for more information.