Mutagene has released Macomate 88 (v0.9.1) a free comb filer VST plug-in for Windows.
An input signal is fed into an array of parallel comb filters. These comb filters are tuned using a microtuning .TUN Scala file, and individual filter decay, brightness etc. can be set using the GUI. The filters' output volumes can be increased by their corresponding notes using MIDI channels #1, 3-16 and a monophonic feedback line can be tuned via MIDI channel #2.
The effect can be used as a reverb, a tuned resonator, a plucked string instrument, a horribly distorted feedback generator and many combinations thereof.