breakscience has released StereoTweak, a freeware VST effect plug-in for Windows PC.
Pretty much it is a rectifier and inverter and short delayed copies of each. Each one, including the dry signal, has an attenuator to control the level. You can also feed the rectified signal into the inverter for more variation.
Each section can be panned and over-all volume can be adjusted as well. These will come in handy, since there is a lot of canceling/amplification going on here.
Download version 1.01 here.