The SeM20 from Bubblesound, their interpretation of an Oberheim SEM filter combined with a MS20 filter.
This is an older module, from 2008, not their later one. Modular Addict still sells this one.
Great sounding unit. OK build, but getting the pots, jacks, and faceplate aligned was a big pain. Even though the soldering is easy, I would not recommend this as an early kit in your career.
But again, it sounds great.
SeM20 build