DjVu is a web-centric format for distributing documents and images. DjVu was created at AT&T Labs-Research and later sold to LizardTech Inc. DjVuLibre is a GPL implementation of DjVu maintained by the original inventors of DjVu.
gPhoto is a program and library framework that lets users download pictures from their digital cameras. The libgphoto2 library gives you access to hundreds of models of digital cameras on several platforms. GIT repo and Issue tracker lives at https://github.com/gphoto/ these days.
GPX viewer and analyzer
GPXSee is a GPS log file viewer and analyzer that supports GPX, TCX, KML, FIT, IGC, NMEA and OziExplorer files.
nomacs is a fast and small image viewer
nomacs is a free image viewer for windows, linux, and mac systems, which is licensed under the GNU Public License v3. nomacs is small, fast and able to handle the most common image formats including RAW images. NOTE: nomacs has moved: http://download.nomacs.org
Comix is a user-friendly, customizable image viewer. It is specifically designed to handle comic books, but also serves as a generic viewer. It reads images in ZIP, RAR or tar archives (also gzip or bzip2 compressed) as well as plain image files.
Simple image comparison tool
DiffImg is a simple image comparison tool which take two images with the same size as input. Some statitics are computed and the positions where pixel differ are displayed as a color mask.
Real-time 3D viewer for LDraw LEGO models with OpenGL acceleration.
LDView is a 3D viewer for LDraw LEGO models with a focus on quality rendering with good performance. It also contains many features geared specifically toward LDraw part authoring.
3DimViewer is a lightweight 3D viewer of medical DICOM datasets.
3DimViewer is a lightweight 3D viewer of medical DICOM datasets that is distributed as open source software. The viewer is multiplatform software written in C++ that runs on Windows, Mac OS X and Linux systems. 3DimViewer source codes are available on Bitbucket (https://bitbucket.org/3dimlab/3dimviewer). Video tutorials can be found on YouTube (https://www.youtube.com/playlist?list=PLCvwUmKRw9ZO4YexLKEXmw_2jPo-kXVRn).
xCHM is a cross-platform GPL frontend for CHMLIB (http://www.jedrea.com/chmlib/) written with the wxWidgets framework.
LinPHA is an easy to use, multilingual, flexible photo/image archive/album/gallery written in PHP. It uses a SQL database to store information about your pictures. It comes with a HTML based installer, so you don't need experience in setting up SQL
ZoneMinder is video and cctv surveillance and security application. It supports multiple video or IP cameras and a sophisticated motion detection system based around zones. Both live streams and historic events can be viewed via the web interface.
Ultimate Webshots Converter is a Webshots pictures converter. It is able to show and save into JPEG files the pictures contained in the following files : WBC, WBZ, WB1 and WBD.
OpenImageManager, the new Opensource Image Manager written in C#. Includes Thumbnails feature, HTML Album Generator, localized to 10 languages and more...
CDnavigator is an application that files your CD in a database. It also deposits information about photos (JPG), music (MP3) and films saved in media. You can also store another metadata as notes, rating, etc. to this data. You can search over all items.
osGraphX is a 3D file viewer based on openscenegraph.
osGraphX is a 3D file viewer. Based on openscenegraph, it can load all the OSG supported file formats.
100% Java: ID3 tag, Exif, JPEG, TIFF, MP3, MP4, OGG, FLAC, WAVPACK, APE, ALAC, DSD, Image lossless editor/viewer/player/organizer. All Internet protocols publishing. A separate Jpeg manipulation library. Full iPod support - smart playlist, artwork, video.