Darktable

Darktable is a free, open source photography workflow application and raw image developer. It is the leading free replacement for Adobe Lightroom on Linux, macOS, and Windows, used by hobbyists and professional photographers alike.

It provides non-destructive editing of RAW files from hundreds of cameras, a powerful tethered-capture mode, an extensive library module for tagging and organising tens of thousands of images, and advanced color science with support for ICC profiles, OpenCL acceleration, and film emulation presets.

Unlike Lightroom, Darktable stores its catalog locally and never uploads your photos to a cloud service. The community contributes an active ecosystem of styles, presets, and LUTs, making it a capable Lightroom alternative for photographers who want full control over their archive.