LightZone

LightZone is professional-level digital darkroom software for Windows, Mac OS X, and Linux, that includes RAW processing and editing. Rather than using layers in the way that other photo editors do, L...
Language(s): Java
Operating system(s): FreeBSD, Linux, Mac OS X, Windows
License: BSD license

RawTherapee

RawTherapee is a cross-platform raw image processing program. RawTherapee involves the concept of non-destructive editing, similar to that of some other raw conversion software. Adjustments made by th...
Language(s): C++ gtkmm
Operating system(s): Linux, FreeBSD, Windows, Mac OS X
License: GPLv3 (as of version 3.0 alpha 1), proprietary (up to version 2.4.1)

darktable

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...
Language(s): C, GTK+
Operating system(s): FreeBSD, Linux, Mac OS, Solaris, Windows
License: GNU General Public License 3 or later.