BRL-CAD is a powerful constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, and image and signal-processing tools.
Scry is a simple, secure, fast, Web-based photo album. It doesn't use a relational database and has no administrative or user front end. Changes to image files and directories are reflected in the albums. Image resizing and caching is done on the fly for speed. It is easily embedded into an existing site via XHTML templates.