RawTherapee, AnotherRawTherapee, darktable, DigiKam, Topaz Studio, Photomatix, ON1, ACDSee, easyHDR, SILKYPIX, AfterShot Pro, Exposure Software and Affinity Photo all use Lensfun as a library for lens profiles.
I wonder if there are more projects that use Lensfun and also the file path to the local database?
For example Exposure Software in Windows, but the database is not in xml format but in its own kind of db making it hard for users to add their profiles themselves.
C:\ProgramData\Exposure Software\ExposureX7\LensProfiles.db