DARKSLIDE GR
Builds modified Ricoh GR III and GR IIIx firmware with film looks, your own LUTs and preset names.
About
Takes official Ricoh GR III or GR IIIx firmware and builds a modified file on your computer, with film looks, .cube or Lightroom LUTs, your own preset icons and names, soft focus and extra aspect ratios. Each build is checked by separate code before download. It runs on macOS and Windows and includes no firmware; the README warns that flashing may brick the camera.