Darktable
Software
Free and open-source RAW editing software as an alternative to Lightroom, available for Windows, macOS and Linux.
Darktable offers a comprehensive RAW workflow including catalogue management, non-destructive editing, and a powerful colour module. The learning curve is steep due to its different approach compared to Lightroom. Fully free and actively maintained by the community. Suitable for photographers who don't want to pay a subscription.