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.
GLE is a library package of C functions that draw extruded surfaces, including surfaces of revolution, sweeps, tubes, polycones, polycylinders and helicoids. Generically, the extruded surface is specified with a 2D polyline that is extruded along a 3D path. A local coordinate system allows for additional flexibility in the primitives drawn. Extrusions may be texture mapped in a variety of ways. The GLE library generates 3D triangle coordinates, lighting normal vectors and texture coordinates as output. GLE uses the GL or OpenGL API's to perform the actual rendering.
Peflp (Povray front-End For Lazy People) is yet another povray front-end that is designed to be easy-to-use while staying useful. It is written in Tcl and features persistent settings so that initiating a pov render on the last project does not take too many clicks, and a reduced ('stamp') image of the project to mouse-select 'partial' rendering zones. The stamp image is rendered directly in small format or extracted from last full render (using ImageMagick).
freeglut is intended to be a 100% plug-compatible clone, and is released under the Xfree license. The GLUT (OpenGL Utility Toolkit) is a widely used library for doing window control, keyboard, and mouse input, and other basic functions for OpenGL programs. However, GLUT is not OpenSourced - although it's source code is available under a somewhat ill-defined set of restrictions. Hence, 'freeglut'.
X3D-Edit is a graphics file editor for Extensible 3D (X3D) that enables simple error-free editing, authoring, and validation of X3D or VRML scene-graph files. Context-sensitive tooltips provide concise summaries of each VRML node and attribute. These tooltips simplify authoring and improve understanding for novice and expert users alike. It uses the X3D 3.0 tagset defined by the X3D 3.0 Document Type Definition (DTD) in combination with Sun's Java, IBM's Xeena XML editor, and editor profile configuration files.