Darktable

Darktable is designed and programmed by photographers for photographers, so there's nothing better than software that does exactly what a photographer needs from their photo management. Darktable uses non-destructive editing so the original image is always preserved, uses GPU hardware acceleration to speed up editing, allows full colour management including ICC support for sRGB, AdobeRGB, XYZ and linear RGB. Photos in the database can be starred, sorted by color labels, etc. Working in the application is smooth thanks to the use of cache, user-friendly and brings photographers an increase in their productivity and a better overview of the images.