http://audacity.sourceforge.net/
The Free, Cross-Platform Sound Editor - 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. Learn more about Audacity... Also check our Wiki and Forum for more information.
http://www.blender.org/
Blender is the free open source 3D content creation suite, available for all major operating systems under the GNU General Public License.http://www.kickstandlabs.com/tools/openpipeline/
openPipeline is an open source framework for managing animation production data and workflow. openPipeline is a framework for animation production. The initial iteration is a plugin for Autodesk Maya. This framework handles file naming, revision control, collaborative notation and scene referencing
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.