Modelling
Aztec is a 3D Modelling and Animation tool that is intended to provide a decent set of tools for use in the Game development process.
Developer: aztec
License: GNU Lesser General Public License (LGPL)
Operating System: 32-bit MS Windows (95/98), All 32-bit MS Windows (95/98/NT/2000/XP), All POSIX (Linux/BSD/UNIX-like OSes), Linux
Ayam is a free 3D modelling environment for the RenderMan interface.
Developer: ayam3d.org
License: BSD License
Operating System: All 32-bit MS Windows (95/98/NT/2000/XP), All POSIX (Linux/BSD/UNIX-like OSes), FreeBSD, Linux, OS X, SGI IRIX
Art of Illusion is a full featured 3D modelling, rendering, and animation studio.
Developer: Peter Eastman
License: GNU General Public License (GPL)
Operating System: OS Independent (Written in an interpreted language)
Italian web based financial monitoring system.
Developer: Alberto Santoro
License: GNU General Public License (GPL)
Operating System: All platform
Entier studio is a php tool designed for developers.
Developer: Yann Romefort
License: Apache Software License
Operating System: Linux, Windows, MacOS
K-3D is the free (as in freedom) 3d modeling, animation, and rendering system.
Developer: k-3d
License: GNU General Public License (GPL)
Operating System: 32-bit MS Windows (95/98), All 32-bit MS Windows (95/98/NT/2000/XP), All BSD Platforms (FreeBSD/NetBSD/OpenBSD/Apple Mac OS X), All POSIX (Linux/BSD/UNIX-like OSes), Linux

More Info