The Comparator, Direction Detector and 4 Quadrant Multiplier can be downloaded here.

The output is from the right hand most socket, the hole below is an offset input.

Its effect is similar to a ring modulator but with differential inputs.

Basically the A2D module takes an incoming digital signal, splits it up into smaller chunks and spits the most significant bits of the signal back out again. You can then use the D2A signal to recombine the output of the D2A module in any order you like. Recombining the signal in the 'right  order' (see picture below) will have the effect of a bitcrusher (as only 8 of the original 16 bits are coming through) whereas swapping the order of the connections will produce a 'bit swapper' with unpredictable distortion.

It's also possible to feed modulation signals through the modules, again with unpredictable, but often interesting results.

The zip file for these modules also contains a very simple example patch.

Each knob can have a cc# assigned to it, and can then be modulated by an incoming signal such as an LFO or an Envelope (or even an audio signal). The knobs will oscillate according to the modulation signals they receive and the Midi Out of the modular patch will transmit the resulting cc messages to any devices attached to the Midi Out.

The device can be downloaded here and read about here.

Matrix

This module can be downloaded from PlanetZ - here's the description from that page:

couldn't get the mdl to auto start so far but just hit the left "off" button till it goes. should be rock solid after that.

the large knob on the right controls the overall freq.

the knobs at the top are for time. attack, hold, decay, off in that order.

middle knobs are for slope. left for a faster rising trapezoid and right for a slower rising trapezoid. these knobs will also affect the time of it's segment. double click the knobs for a true linear trapezoid.

the bottom knobs are for modulation amplitude.

there are two outputs. one you could say is the sine and the other the cosine. the relationship of the waveforms is exactly like the picture on the mdl.

There's also an example patch on the same page which gives an idea of how this can be used (needs Flexor).

Download module and example patch from PlanetZ. 

"the lin/log button will change how the midi is splitting up the data so if you change from lin to log you must deassign then reassign the cc# for the knob to be remapped.

my main gripe about the dezips is that they still land on the same value so i added a fine tune knob to really dial in lfo frequencies."

"it uses sin/cos lfo to rotate a vector image. the xfade mdl's (of the demo patch) push the image into the proper quadrant for amplitude modulation"