BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.
Loki Render allows you to create your own render farm, serving Blender render jobs to a group of computers. Loki is easy to setup and runs on Linux, Windows or Mac, making it a quick and flexible distributed network rendering solution!
Open Factory 3D is a free factory design application that helps you to place your machines and factory equipment on a factory 2D plan, with a 3D preview.
yadra - yet another distributed rendering application
A Network-Render-Tool for Blender. A Java based, platform-independent tool, for rendering animations of blender in a network. Easy setup (no SMB/CIFS-Connections). Web-Interface.
My application is a Grid Computing application that interfaces POV-Ray (http://www.povray.org/) with the framework JPPF (http://www.jppf.org) . With my JppfPov you can use the potentialities of a grid computing network to make rendering task.
avoCADo is a 3D design and modeling program (CAD) which aims to be a collaborative tool with an intuitive user interface for both engineers and artists alike. avoCADo is open source under the GPL.
nemosomen is a framework for designing open source, network based, multimedia (video/openGL/sound/MIDI) realtime toys
a suite of tools for distributed development, processing of media. It tries to shift most of the working process in realtime processes.
BORG - BORG Open Rendering GUI - is a network rendering system developed by TAUTOLOGIX for RenderMan compliant renderer. BORG is platform independent and used to distribute rendering jobs. It can also be used as a GUI for the supported renderers.