3D Modelers
Moonlight3D, 3D modeling, animation, GStreamer integration, POV-Ray export
KPovModeler, modeler with POV-Ray scripting support
ppModeler, modeler with POV-Ray export
Wings3D, polygon mesh modeler, OpenGL, POV-Ray plug-in
Giram, Giram Is Really A Modeler, GTK+ based, POV-Ray oriented
Truevision, Gnome-based 3D modeler with OpenGL
k3d, 7 degrees of Freedom, OpenGL
Blender3D, OpenGL based GUI
3dom - A 3D Object Modeler, includes OpenGL editing
EQUINOX-3D, OpenGL based +nVidia Cg support
Misfit Model 3D, OpenGL based, imports Wavefront and Lightwave
Y.A.P.R.M. ("Yet Another POV-Ray Modeler")

more Windows based modelers...
DAZ Studio, home of Bryce, Carrara, Hexagon, Amapi and free 3D DAZ Download
e-frontier, home of Poser
Autodesk Products, AutoCAD, 3DS Max, Maya
SolidWorks

3D Software Benchmarks & Reviews
3D applications 2008 comparisons table

3D Model Converters
PovAnim
Export Blender Animations To Other Renderers, python scripts
also see Video & Graphics Programming Links: Kits and Binders

Renderers
POV-Ray, The Persistance of Vision Raytracer
Mega-POV
SkyPOV, atmospheric effects included
The PVM patch for POV-Ray, patch for distributed parallel rendering
MPIPOV, Parallel Pov-Ray implementation
Tachyon Parallel / Multiprocessor Ray Tracing System, uses MPI for distributed memory parallel computers
VERA Raytracer, preprocessing using a regular grid technique
Aqsis, Aqsis is a high quality, photorealistic, 3D rendering solution. It complies with the Renderman® interface standard defined by Pixar.
Segmented & Parallel Rendering
POV-Anywhere
POV-Ray : Documentation : 2.1.2.2 General Output Options
Xgrid example: Parallel graphics rendering in POVray
Parallel Rendering Using POVRAY on a Computer Farm
render-segments.ksh
merge-ppm.c

POV-Ray frontend
povedit, POV-Ray front-end utility
xpovray, X-Povray Front-End
QTPovEditor, POV-Ray SDL Editor

POV-Ray Docs & Tutorials
Paul Bourke, Modelling, Rendering
Christoph's page: Raytracing
Dr. Stefan Immel's POV-Ray (& MolArch) examples, Technische Universität Darmstadt
3D Graphics: Tutorials: The Gurus Network

Models
POVRay Objects Collection

Spaceship Modeling
Sci-Fi Meshes
Scratchbuilding Sci-Fi Models Tutorial
Starship Modeler
Moe's Eisley
Open Directory - Recreation: Models: Scale: Science Fiction

Space Scenes
BetterSpace, This set of tutorials is designed to help you create better looking, more realistic space scenes in your 3D animation package.

Solid Model Generators
Surface de Revolution, Povray surface of revolution monitor, French site
Christoph's ISOcsg Library , offers often requested bending and nonlinear transformations not normally possible
Torpath Homepatch, generates POV files to create toroids from points in Space

NURBS, Surfaces, Tiles, and Meshes(Triangular and otherwise)
K3DSurf 0.5.4, The mathematical surface modeler
openNURBS
Triangle A Two-Dimensional Quality Mesh Generator and Delaunay Triangulator.
Gmsh: a three-dimensional finite element mesh generator with built-in pre- and post-processing facilities
2D Constrained Delaunay Unstructured Mesh Generator
The GTS Library, the GNU Triangulated Surface Library
JK's POV-ray pages, Povray macro output for Tiling, Asymetrical Spheres, Lenses, Random Numbers, Round Boxes, and Mesh Boxes
the compressed mesh macro file, compresses meshes 70% - %80
the tile generator macro file
Latticework Macro, can produce 31 different designs and with three different cross types and can apply the texture at three different levels

Synergetics Model Generators
Dome, from Applied Synergetics
This is a version of Richard J. Bono's Dome program, tweaked to compile on Linux, from Senecass Solar
Tessel2 is a 3D "compiler" to produce crystal and molecular models, parametric surfaces and several forms of sphere tesselations
TesselSphere, an OpenGL ® spherical subdivision utility that can generate vertexia for radiolaria, pollen, viruses, geodesic spheres and other spherical polyhedra
Geodesic V2 Macro, Povray output of Geodesic forms
Geodome: Geodome creation for POV-Ray
Distributing Points on a Sphere, Swinburne article

more synergetics resources
R. Buckminster Fuller's SYNERGETICS
Spherical to planar transformation
Constructing Polyhedra from Repelling Points on a Sphere, really nice set of python scripts for generating Polyhedra

Radiolaria
Reticulated Geodesic Constructions
Gallery Radiolarian
Radiolaria.org, includes excellent link list

Looped and Iterated Forms
About While-Loops with the POV-Ray Raytracer, Friedrich A. Lohmueller loops
ABWTwist: Twisted Shapes for POV-Ray
No Lights - Recursive Spheres

Chaos based forms
Paul Bourke Fractals

Fractals
Fractal Explorer

Organic Model Generators
Grammidity, a genetic programming system based on the idea of using a kind of grammar as the underlying gene
Bioform
Fractal Life Engine Gallery
ShellyLib, is a small library to create shapes of seashells and snails.
CS 563 Advanced Topics in Computer Graphics: Rendering Plants, well illustrated explaination of tree/plant branch process based on Koch curve
Algorithmic Botany, the website of the Biological Modeling and Visualization research group in the Department of Computer Science at the University of Calgary L-Systems
L-Systems and Lparser, Laurens Lapré's page
L-System Tutorial, from C.J.van der Mark
A sketch book on L systems, LS SketchBook, a nice graphical guide
L-Systems, includes l-system.c based on The Algorithmic Beauty of Plants

Animal (including Human Figure) modeling
MAKEHUMAN, MakeHuman is a Python language script (Python.org) to be used within the open source, 3d graphics software package

Curves
POV- Bezier Curve Include File
POV - Spline Macro Tutorial
POV - Hermite curve generator, "... unlike B-Spline curves, the curve intersects every control point..."
Hermite Curve Interpolation
Guru's Lair Cubic Spline & Bezier Curves Library
Fractallic -- Koch Curve (& L-Systems, etc.)
Two-dimensional L-systems

IK, and other Animation Tools
Rune's Inverse Kinematics Neck Include File
Rune's Lipsync System

Lens Tools
the lens effects include file

Gems and Crystal Forms
3D Lapidary -- The Basic Stonecuts, A guide to modeling gemstones
POV-Ray - Gem Texture Include, includes refractive levels
Brilliant Cut Diamond, French Site

Terrain Generators
The Genesis Toolkit, a set of exectuables to work with POV-Ray height fields
Terraform
Gforge and HF-lab
POVScape, includes source
Geomantics
Creating caves in POV-Ray
Demeter Terrain Engine Home Page, Demeter is a cross-platform C++ library that renders 3D terrains using OpenGL.
resources
Virtual Terrain Project, truely cool site detailing the construction of any terrain type, including plants, trees, etc.

Trees
Tree and leaves generation: MakeTree macro (maketree.zip), Giles Fran's site
Arbaro - tree generation for povray
Project: Arbaro: Summary
TREES.inc version 3.0, for Povray
Arbres, tree generating tool, French site
TREES, French site
TomTree
Selftree, inc., German site
PTD Tree 3, Povray output
Splinetree
POV-Tree
greenworks/products, Greenworks Organic Software, home of Xfrog and XfrogPLANTS

Grass & Moss
Grass and prairie generation: Makegrass macro (mgrass.zip), Giles Fran's site
Example of use of the Makegrass macro
Grasspatch
Rune's Grass Tex Include File: grasstex.zip

Plants
Models: tree, plants and butterfly: plants_demo.zip, Giles Fran's site

Natural Objects
Vegetate object placement routine, This include file will place objects at random on the surface of any object.
PTD_SNOW - Snowflakes in POV-RAY
IsoWood Include File
Rocktools Homepage

Water, Oceans & Waves

Clouds & Atmosphere
The MakeCloud macros, Giles Fran's site
How to create realistic skies with POVRAY

Celestial Forms
Digital Asteroid Models
POV - Galaxy Include File
Pov Planetarium v0.9
How to Make a Moon, POV - Rendering Lunar Spheres and Surfaces
Sun Position
...also see Astronomy Links

Molecular
VMD is a molecular visualization program for displaying, animating, and analyzing large biomolecular systems using 3-D graphics and built-in scripting