Darktable 1.6.7 recently released, is an open source 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.

Darktable 1.6.7 changelog

security

• libraw CVE-2015-3885: fix integer overflow in ljpeg_start()

miscellaneous

• improvements to facebook export
• interpolation fixups
• demosaic code cleanups
• slideshow should handle very small images better
• improve Olympus lens detection
• various minor memory leak fixes
• various other fixes
• Pentax (K-x) DNG old embedded preview left over is now removed
• modern OSX display profile handling

translations

• Catalan
• German
• Spanish
• Swedish

See changelog for more

Install Darktable 1.6.7 on Ubuntu OS

sudo add-apt-repository ppa:pmjdebruijn/darktable-release
sudo apt-get update
sudo apt-get install darktable