At Julia Computing, we've talked about doing TCAD stuff as an extension of our new analog SPICE-compatible simulator work, since we have all the pieces (PDE solvers, parallelism, meshing, GDSII reader, etc.), So it should just be a matter of hooking up the materials property library. Some funding agencies have expressed interest in funding us for this and put is in touch with some academic groups who work on this and were planning to introduce us to the relevant groups at the foundries. Nothing concrete though yet. Are you looking for something specific wrt TCAD and sky130?