RAW developers and RAW workflow
Bibble by Bibble Labs:
Commercial, professional RAW workflow for fast development of large number of photographs. The linux release is fully supported and fully featured. Program is able to do all corrections needed in a workflow. If you are looking for a great noise reduction give it a try as it incorporates noise ninja algorithm. Be sure not to miss wonderfull plugins (some of them are free) and if you are willing to write one - ask Bibblelabs for an SDK.
open source photo management for KDE, surprisingly good quality, quite complete application, some GUI improvements needed to make processing faster (GUI is designed for amateurs). Good RAW support.
an open source and platform independent RAW converter. It is based on dcraw and features corrections driven by lensfun and a processing pipe with enhancement and creative filters which work on 16 bit linear data.
jdlRaw is an open-source program to read and 'develop' RAW images from most digital cameras. It reads raw images using a modified version of Dave Coffin's raw conversion utility DCRaw.
Lightzone by Lightcrafts:
It is an application with some DAM capabilities and unique editing features, dedicated to photography, not computer graphics. Please read the review for more details. Does not seem to be developed actively. Commercial licence.
Raw Studio :
Open source, GTK RAW developer. Very fast and simple, so if you are looking for something that will simply convert your RAWs into jpegs or tiffs reproducing colors right (white balance, color management) try Rawstudio. If you want to do some more processing look for something different or export images through rawstudio to image editor. Supports nearly all RAWs as it uses DCRaw for decoding and demosaicing.
Raw Therapee by Gábor Horváth:
Open source, GTK application that delivers surprisingly high quality.
UFRaw by Udi Fuchs :
It used to be open source plugin for the GIMP allowing it to open RAW files using DCRaw. Now it is not only a plugin for GIMP and Cinepaint but also a standalone RAW developer. It allows user to tweak the conversion selecting demosaicing algorithm, gamma value, white balance and some more. If you are looking for low level developer - here it is. If you want to do something more you need something more than this. It allows to do command line batch processing.
photo manipulation (not all applications have RAW support)
an open source painting program used to retouch movies, frame by frame, GTK1, some advanced features
commercial set of filters for processing digital photos and images.
KDE GUI for DCRaw and Image Magic
well known open source, GTK image editor, lack some features needed in photo retouching, RAW support via UFRaw plugin
This is GIMP that tries to look like Photoshop, no new features, only changes in GUI
java open source image editor for technical and scientific purposes, quite fast
open source application for massive image processing, developed by National Digital Archive of Poland (Narodowe Archiwum Cyfrowe) and released under GPL v3.
image editor, a part of Koffice, some interesting features
Paint Mono :
Paint.net is a great open source application for windows. Paint Mono is a linux port (from .net to mono platform) done by Miguel de Icaza (blog). It is unofficial and may contain bugs but definately worth tracking.
free for personal use, java image editor, not very usefull in photography (maybe for special effects)
commercial, fully featured image editor, trial available, some advantages over GIMP
commercial astrophotography application with many features (RAW support, color management), QT
photo managing (not all applications have RAW support)Album shaper:
open source application for organizing, annotating, framing, enhancing, stylizing, and sharing digital photos
open source, Mono based, photo management for GNOME, lack some features, basic RAW support
FLTK based photo management and basic photo manipulation program, supports RAW
open source, GTK application for image editing, panorama stitching and HDR
manages large collection of photos, creates web galleries and videoCD
simple GTK photo manager (rotating, moving, doing backup and simple webgalleries)
simple GTK photo viewer that opens RAW files using DCRaw
photo manager, with some interesting features
organize, share and backup your photos
an open source photo manager for KDE
rather old photo management for KDE
open source image management
Mission Photo :
an open source, GTK+, very simple, and very basic image management
GPL photo archiving/managing application, needs java
Picasa by Google :
linux version of amateur, free application, slow since it uses WINE, but looks good, basic RAW support
freeware (but only for non-commercial use), multiplatform, multimedia viewer, browser and editor
other interesting programs
Autopano Pro :
Commercial, professional panorama stitching solution.
Blue Marine by Fabrizio Giudici :
open source java application for tasks like photo-geotagging, basic RAW support
a GUI frontend for several color management utilities
free panorama viewer - in development
simple python application for applying the right gamma to your monitor
open source, very fast, GTK image viewer with color management, currently unmaintained
a new version of gqview, shares the same speed but adds more functionality, still unstable
open source, GTK frontend to panotools, a panorama stitching application
QT, open source image viewer with unique search capabilities
open source image merging application. create one noiseless image from many noisy (but similar) shots
free web album software, needs java
icc profiler with GUI
freeware java denoising application
Noise Ninja :
noise removing tool
a visual tool for creating perspective views from panoramic and wide angle photographs
wxWidgets based batch printing application
Photo Acute :
commercial software that combines many shots into one, noiseless, sharp and in general better image. RAW support. There is no native linux release but company made windows version fully compatible with WINE.
GPL utility for printing digital photographs (icc, 16 bits support)
an open source data recovery (various file types support, from .zip to camera RAW)
an open source application for controlling Pentax cameras using PC
small application for rotating and cropping images
Commercial printing solution. I found a small note on their website that it works under linux using WINE, I didn't test it.
open source, QT application for HDR image merging, RAW support
Rapid Photo Downloader :
download, backup and rename your photos, GTK, GPL
commercial, advanced printing utility, free version (for private use, with some usability restrictions) available
free for personal use java application that recovers blurred images
advanced scanning utility, can read camera RAW files
command-line tools (sometimes with simple GUI)
GNU, command-line, utility that merges many images to get noiseless, high resolution result
Argyll CMS :
open source, ICC compatible color management system
open source, command-line program for developing all RAW files, basic RAW IO code for many (even commercial) RAW developers, use UFRaw-batch if you want to do command line batch processing, has more possibilities and it is easier to use
Modified DCRaw by Paul Lee :
Experimental demosaicing algorithms coded by Paul Lee and published as modified dcraw
yet another open source image processing library
GPL EXIF tools (command line and GUI)
a command line and GUI for managing your camera
Graphics Magick :
open source fork of Image Magick
G'MIC is an open framework for processing images (there is GIMP plugin)
Image Magick :
open source, command-line tool for displaying, converting and editing images, good for writing scripts that will process hundreds of images
open source, command-line tool for processing images
camera calibration and HDR merging tools
a scientific project about merging images, source code available
a monitor calibration loader for X window