darktable 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.
What's new in version 1.2.3
Increased maximum cache size to 8GB
OS X: fix Facebook uploads
Adjustments to default lowpass blur settings
Adjustments to dithering slider ranges
Metadata viewer: fix display of focal length: indicate unit and hide if invalid.
Chromatic Aberrations: fix segfault for small buffers
Color pickers: fix various issues, e.g. #9482
More guides for Crop & Rotate
Improve light table usability: when viewing images in fullscreen wrap around at line end when pressing right arrow key
Soften: massive speed improvements by using SSE and OpenMP
Deleting images from camera is not supported anymore for safety.
Exposure module now supports multiple instances
Support for custom meta data burn in (see commit 6ac7ba055440aa27f79f0a67ac112799a0e7785e)
OpenCL support for nVidia GeForce GT330
PFM: load timestamp as date & time taken.
Fix bug prohibiting image rating by mouse
Update Picasa uploader: references Google+ now
Some fixes for memory leaks, deadlocks, background jobs
Fixes of on-screen handles for Crop&Rotate and GND modules
0 bytes files will no longer be imported but ignored