3Delight is a very fast RenderMan-compliant renderer designed to produce photorealistic images for serious production environments. Some of its features include ray tracing, global illumination, motion blur, depth of field, subdivision surfaces, programmable shaders, quality antialiasing, and antialiased multi-depth shadow maps. The API and the shading language are very similar to what is described in the RenderMan interface documentation.
album is a free HTML/XHTML photo album and gallery generator that supports themes/skins. You can choose different themes or write your own to get different layouts and styles. It creates all your thumbnails (including directory thumbnails) and descends into directories so you can organize your photos. See the home page for more examples. album is also multi-lingual, with many languages being added all the time. N.B.: The purchase link is provided for donations; the software does not cost anything.
Allegro is a multi-platform game library for C/C++ developers that provides many functions for graphics, sounds, player input (keyboard, mouse, and joystick), and timers. It also provides fixed and floating point mathematical functions, 3D functions, file management functions, compressed datafile, and a GUI.
Athene is a desktop system for Linux that uses its own graphics drivers for high speed access to your graphics card. Because the Athene desktop and its applications have direct access to the graphics hardware, they have a significant speed advantage over conventional X applications. Athene is also backwards compatible with your existing X11 software. It features a highly responsive interface, scalable icons, translucency, alpha blending, Unicode support, and Windows compatibility.
AxY FTP (formerly known as WXftp) is an easy-to-use FTP client for the X Window System. Features include an intuitive user interface (Motif and GTK+), side-by-side local and remote directory listings, simple and convenient session manager, on-line help, progress bar, passive and non-passive transfers, and more.
Behemot Graphics Editor is a graphics program which allows you to model and render 3D objects and scenes. It can create and graphically modify b-rep, blob, NURBS models. It can also logically intersect or subtract objects, render text into solid objects, edit polyline and NURBS curves, build rotation and sweep solids and link objects into groups for easy movement. Complex animations and advanced modelling operations can be realized Prolog scripts. Customizable vector fields allow you to deform the model. It can export scenes in DXF or VRML format or animation in MPEG format, and import some DXF and 3DS files.