The nonlinearcircuits 4SEQ is a 4 stage sequencer with a forwards/backwards control (the u/d or up-down jack) allowing the development of quite complex sequences and patterns.
There are two CV outputs that are
the reverse of each other. Eg if outX is counting 1,2,3,4 then outY counts
4,3,2,1. There are also gate outputs that are /2, /4, /8 & /16 divisions of the clock signal.
I'm not sure if you can buy the 4seq fully made. I built mine from PCB. The build notes are here.
The piston honda is a wavetable oscillator. It has 2 ROMs , each with 256 waveforms.
The acid sequences are Metropolis - VC.303bass synth