The Darktable RAW photo editor and workflow manager for Linux (and experimental support for Mac OS X and Windows) is for non-destructive editing of RAW photo images. It includes common features such as cropping and exposure fixes, manipulation of color and tone channels, and advanced features like a Fujichrome Velvia film plugin (for smoother, more realistic saturation), HDR, and tethered shooting. I put the March 15 release of version 1.0 through the torture chamber, and even though the interface and workflow take some getting used to, it’s a powerful editor for serious work.