Gimp GIMP is an acronym for GNU Image Manipulation Program. It is a freely distributed piece
of software suitable for such tasks as photo retouching, image composition and image
authoring.
Giv giv is an image viewer based on the gtk_image_viewer widget.
KIllustrator KIllustrator - a vector
drawing program for
KDE
KImageMapEditor KImageMapEditor allows you to load an existing image map from an HTML file, edit it,
and save the new map to a new HTML file, that includes the appropriate image tag.
Maverik Maverik is a system for managing display and interaction in virtual reality applications. It is designed to addresses the challenges
of VEs where many objects have real geometry and therefore afford interaction.
Plotutils The GNU plotutils package contains software for both programmers and technical users. Its centerpiece is
libplot, a powerful C/C++ function library for exporting 2-D vector graphics in many file formats, both vector and
raster.
Quick Image Viewer QIV is a very small and pretty fast gdk/Imlib image viewer for FreeBSD.
RayChase RayChase is a darn fast random recursive raytracer wich will render cool images all by itself and will display them on your desktop.
Xpdf Xpdf is a viewer for Portable Document Format (PDF) files. (These are also sometimes also called
'Acrobat' files, from the name of Adobe's PDF software.) Xpdf runs under the X Window System on
UNIX, VMS, and OS/2.
Xplanet Xplanet can read and write GIF, JPEG, PNG, PNM, and TIFF image file formats.
XVScan for BSD/OS XVScan comes with full source code. The scanning extensions affect only about 15 of the 6000 lines of xv source code, so if
you've tweaked your version of xv you should be able to add the changes to XVScan without much trouble.