Swiss army knife of image processing
GraphicsMagick provides a set of commandline tools and programming APIs for manipulating, editing, and converting raster and vector images. It is derived from ImageMagick, with the objective of providing better stability and performance than ImageMagick while retaining the original MIT/X11 license.
CsGL is OpenGL for the .Net Framework, providing support for OpenGL 1.1 - 1.4 and numerous extensions.
A powerful C++ class library for image manipulation
ImageStone is a powerful C++ class library for image manipulation. Its features include load, save, display, transformation, and nearly 100 special image effects. It can be used cross platform (includes Windows, Linux, Mac), and especially under windows it can be used as a DIB wrapper class.
AstroCam is an C based daemon process for Linux and BSD to control stepmotors via SMC 800 cards. AstroCam also includes both, an PHP-based WebInterface and one based on Perl, for remote Stepengine control. You can control webcams with it.
Moved to http://code.google.com/p/evil-programmers/
xzgv is a keyboard-controllable fast picture viewer. Its thumbnail-based file selector can copy, rename and move images, rotate by multiples of 90 degrees and mirror them. Displayed images can have their zoom, contrast, brightness and gamma adjusted.
Reference library for supporting the Portable Network Graphics (PNG) format.
A library and reference application for viewing and analysing raster and vector geospatial data.
SLFFEA stands for San Le's Free Finite Element Analysis. It is a package of scientific software and graphical user interfaces for use in finite element analysis. It is written in ANSI C by San Le and distributed under the terms of the GNU license.
Image browser and viewer for Unix/X11
XImaging is a raster graphics browser and viewer with basic file management functionality. Its user interface is based on X/Motif. If desired, it can be built with CDE/ToolTalk support. XImaging is distributed in source code form. See the README file inside the distribution tarball for build instructions. Latest development version of the source code may be obtained from the official website (see link below).
A simple image viewer
ImgView is a simple image viewer for Linux/Unix. It is free from menus and other GUI gadgets, and controlled primarily by the keyboard. It supports the following image file formats: GIF, JPEG, PCX, PNG, PNM (PBM/PGM/PPM), TIFF and XBM. It is able to scale images with non-square pixels so that they display correctly on a display with square pixels. It supports RGB, Gray and CMYK ICC profiles in TIFF and JPEG, RGB and Gray ICC profiles in PNG, and RGB ICC profiles in GIF. Display of Exif, XMP and other metadata is realized through the use of ExifTool.