POV-Ray official site^web 
Could you imagine to miss that one ??! This is obviously a must-see. Visit their numerous links to find other unofficial versions like Pov4Grasp and MegaPOV.

MegaPOV^web 
MegaPOV is a development version of the future release of POV-Ray (3.5) maintained by Nathan Kopp (member of the POV-Ray Team). Its new features are so numerous that I cannot describe all here. Among them you will find support for smoothing textures on mesh triangles, that now is used by other softwares (see below). Also you can perform a motion blur effect on any object. Visit these pages to discover all other sweeties !

The POV-Ray Include Files Page^web 
The Chris Colefax's pages present an important set of useful include files and macros he developped for POV-Ray users. I especially used one of them, the TRIMAP.ZIP macros^web  to compare with my implementation of per-vertex color scheme in triangles. Also you will find other interesting tools as spline generator, nice for doing animations.

GRASP Home Page^web 
GRASP was probably the first software in the early 90's to focus on the molecular surface properties in a visual manner. It has become a standard for structural analysis of mostly proteins and nucleic acids.

Rasmol Home Page^web 
Maybe the most famous, simple (yet powerful), and free software for looking at molecular structures. Runs fast and "everywhere" as a lot of architectures are supported.

MolMol^web 
MolMol is a powerful tool for displaying/analyzing molecules. POV-Ray and now MegaPOV output are supported.

Swiss-PdbViewer^web 
Another nice tool for manipulating molecular structures. It is linked to the Swiss-Model (automated homology modelling server) and is able to read GRASP surface files among other things. Has POV-Ray/MegaPOV output support.

DINO: Visualizing Structual Biology^web 
The new DINO software offers nice possibilities for combining the different kind of data produced in the field of structural biology, and has POV-Ray output. Its author also provides his own POV-Ray patch code to allow for smoothing colors on molecular surfaces.

Visual Molecular Dynamics^web 
The name says all. VMD provides POV-Ray support also.

MSMS^web 
A powerful new algorithm and tool to build molecular surfaces.

GLR^web 
GLR allows to manipulate GRASP surfaces on non-SGI machines. It used to support the Pov4Grasp syntax until POV-Ray 3.5 came out. Also its author provides the msms2srf tool which converts MSMS surface to GRASP .srf binary format.

Povscript+^web 
Povscript+ is an extension to Molscript^web which provides support for many new features including GRASP/MSMS surfaces as well as electronic density maps.

The Molray molecular graphics web interface homepage^web 
The Molray software has support for POV-Ray and Raster3D, is able to read Molscript scripts and also GRASP surface files.

SurfOut^web 
This page is providing another tool which convert a GRASP surface file to Raster3D and POV-Ray scripts. Source code is crypted and you must e-mail the author to get the decryption key. I didn't tested it...