Free conversion LUTs for 8 camera formats: Sony, Canon, Arri, Fuji, Lumix, BM, RED, iPhone.
Go to Project Settings → Color Management → Open LUT Folder, then copy the downloaded .cube file(s) into that folder. Restart DaVinci Resolve, right-click a clip on the Color page, and the LUT will appear under 3D LUTs in the panel on the right.