Darktable

Darktable is a photography workflow application and RAW developer. A virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them.

Shotwell

You can use Shotwell to organize your library of photos.

• Import multiple formats
• Edit tags
• Convert formats
• Simple editing on the fly
• Publish directly to social sites