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.
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.
Chango is a system for cacheing MP3 files from multidisc cdrom drives. Since you can't actually mount different discs in the same physical device simultaneously, this software will cache the files you need off to a predetermined cache, so that all of the needed files will be available simultaneously.
csv2png and csv2jpeg use the GD library to plot time series data from a CSV file to either a PNG or a JPEG graphic. The program is deliberately simple, and is targeted at CGI applications. Originally written for RISC OS as csv2gif (see Acorn User, issue 215) the latest distribution builds on Linux as well.
Dvbnrc is a TCP Daemon written in Perl that allows you to remotely control a Nokia Mediamaster running DVB2000 through a serial nullmodem cable. It allows you to telnet to the box, get the list of available TV/radio channels, change tha channel, show the current one, or change the text of the LCDisplay.
im2html walks a directory hierachy filled with categorised images and makes HTML indices and thumbnails for everything. It's easy to customise the titles of each page, add descriptive HTML for images or the page as a whole, add references to related web pages etc. It's incremental, so you can run it nightly in a cron job to keep things up to date, reducing most maintenance to "copy the image into the right subdirectory and wait overnight". It's careful to not rewrite index files unless their contents change, making maintenance of a remote gallery from your master copy with a tool like rsync efficient.
ImageMagick (TM) is a package for the automated and interative manipulation of images. It supports the display and interactive manipulation of images when used with the X Window System. Although the software is copyrighted by ImageMagick Studio, it is available for free and can be redistributed without fee. ImageMagick may be used as a component of both open source and proprietary applications. ImageMagick compiles and runs under Unix, Linux, Windows '95 and later, Apple MacOS, and Compaq VMS. Binary packages are available for most operating systems. Application programming interfaces (APIs) are provided to support development of image processing applications in the C, C++, and Perl languages.