Blender is the open source software for 3D modeling, animation, rendering, post-production, interactive creation and playback.
Available for all major operating systems under the GNU General Public License. Also try this...
...our Blender page.
Gimp is the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring.
It works on many operating systems, in many languages.
Inkscape is an Open Source Vector graphics editor, with capabilities similar to Illustrator, Freehand, CorelDraw, or Xara X using the W3C standard Scalable Vector Graphics (SVG) file format.
YafRay is a powerful Raytracer, under the LGPL license.
It enables you to create fantastic images and animations of a photorealistic quality.
CinePaint is a collection of free open source software tools for Deep paint manipulation and image processing.
CinePaint is used for motion picture frame-by-frame retouching, dirt removal, wire rig removal, render repair, background plates, and 3d model textures.
DrQueue is an Open Source Render farm managing software.
It distributes shell based tasks such as rendering images on a per frame basis.
DrQueue works under Linux, FreeBSD, Irix, Mac OS X and Windows.
It is distributed under GPL and is composed by three main tools: master, slave and drqman.
Digilab's Vodoo Camera Tracker is a non-commercial software tool developed for research purpose at the Laboratorium fr Informationstechnologie, University of Hannover.
Permission is granted to any individual or institution to use, copy, and distribute this software,
provided that this complete copyright and permission notice is maintained, intact, in all copies and supporting documentation.
ZS4 Video Editor , the new incarnation of Zwei-Stein Video Editor, is advanced video editing and compositing software with over 150 built-in video effects.
ZS4 runs on Windows, Linux and OSX and is free to download and use.
Audacity® is free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems.
VLC is a free cross-platform Media player.
It supports a large number of multimedia formats, without the need for additional codecs.
It is available for almost every OS.
It needs little CPU power.
OpenOffice.org is a multiplatform and multilingual Office suite and an open-source project.
Compatible with all other major office suites, the product is free to download, use, and distribute.
On another level and geared towards high-end productions...
OpenEXR is a High Dynamic-Range (HDR) image file format developed by Industrial Light & Magic for use in computer imaging applications.
ILM has released OpenEXR as free software.