FFView is a fast OpenGL-powered picture viewer a la ACDsee. It is aimed at letting you read manga or other comics onscreen (in either windowed or fullscreen mode). Its features include fast prefetching, smooth panning, voice commands, the ability to browse pictures inside archives (.rar/.cbr, .zip/.cbz) and persistent per-picture options.
Exiv2 is a C++ library and a command line utility for managing image metadata. It provides fast and easy read and write access to the Exif, IPTC, and XMP metadata of images in many formats. The Exiv2 command line utility prints Exif, IPTC, and XMP metadata including Makernote tags in various formats, adjusts Exif timestamps, renames images according to the Exif timestamp, extracts and inserts Exif, IPTC, and XMP metadata and JPEG comments, or deletes the thumbnail or a specific type of metadata from an image.
skyviewer is an OpenGL-based program to display HEALPix-based skymaps, saved in FITS format files. The loaded skymaps can be viewed either on a 3D sphere or as a Mollweide projection. In either case, realtime panning and zooming are supported, along with rotations for the 3D sphere view, assuming you have a strong enough graphics card.
ViewIt is a fast and easy to use image viewer that supports most popular image formats, including JPEG, TIFF, PNG, PSD, raw, dng, and more. Important features include a unique, intuitive interface, fullscreen mode, quick image sorting, printing, digital camera support, and EXIF tags. It currently includes plugins to convert file formats, create Web pages, create Finder previews, lose less JPEG transformations, support shell scripts, rename images sequentially, create contact sheets, and email images.
JCap is a Java application for adding captions and descriptions to your digital photograph collection and includes a search dialog for finding photos later. It is completely self-contained; it doesn't require a separate database application or Web server to run. Captions, descriptions, and keywords are stored in plain text files in the same folder as the images they describe and can be read by any application that can read text files. The primary goals are: to help you find photos later, to help share photos with others, and to be able to read photo captions and descriptions thirty years from now on whatever computer you happen to have at the time.
Mage is a 3D vector display program that shows "kinemage" graphics used in both teaching and research, in applications ranging from estuary ecology to X-ray crystallography model quality assessments. It displays the 3D relationships between data in an interactive environment, which facilitates both open-ended exploration and structured presentation. It includes many tools for on-screen measurement, construction, and editing of the display objects, and can write either kinemage output or various types of 2D images.
xCHM is a cross-platform GUI frontend for CHMLIB, written with wxGTK. It is able to display the topics tree, work with displayed pages history, print the current page, work with bookmarks, change fonts and fast search through all the pages of the loaded .chm document. Being indirectly dependent on GTK+, the possibility of changing GTK+ skins makes xCHM theme-friendly.