Phasic have released PHInterfereVST, which is described as a unique sounding lo-fi/interference effect that modulates and mixes pink noise with the incoming signal, giving a grainy/interference style of distortion. Subtle effects can be achieved by using slow LFO rates with low depths, or you can go to the extremes.

PHInterfereVST is free but donations are welcomed. They also offer several other Windows VST plug-ins - MultiShaper, DCOffsetKiller, DegradeFX and PhasicMultiFX.