Visualization and Imagery Solutions, Inc.
Consulting, training, and support for IBM's Visualization Data Explorer and the new OpenDX visualization software.
http://vizsolutions.com/

Santa Cruz Laboratory for Visualization and Graphics
Conducts research in animal modeling and animation, environmental visualization, uncertainty visualization, virtual reality, nomadic collaborative visualization, tensor visualization, and flow visualization.
http://www.soe.ucsc.edu/research/slvg/

XYZ Solutions
XYZ Solutions is a software company offering software libraries for 3D visualization, distributed data acquisition, and database connectivity tools, as well as applications and professional services. XYZ Solutions area of expertise includes engineering software, surveying software, 3D land modeling, 3D visualization, intelligent systems, SCADA (supervisory control and data acquisition), simulation, and virtual environments. Additionally, XYZ Solutions provides training, consulting, and professional services.
http://www.xyzsolutions.com/

Visualization and Interactive Systems Group (VIS)
University of California Irvine. Conducts research in the areas of scientific visualization, virtual reality, image based modeling and rendering, volume visualization and biomedical imaging.
http://vis.eng.uci.edu/news/

Kitware Inc. Visualization Toolkit
VTK is an open source, freely available software system for 3D computer graphics, image processing, and visualization. Supports a wide variety of visualization algorithms including scalar, vector, tensor, texture, and volumetric methods
http://www.kitware.com/

Inova Solutions
Inova Solutions is a top provider of real time communication solutions including: Call Center Optimization, Public Information Display, Emergency Mass Notification, Middleware-based data integration and Power over Ethernet displays.
http://www.inovasolutions.com/

Army Research Laboratory MSRC Scientific Visualization
Conducts research in the development of new techniques for exploiting high-performance computing technology, promotes the use of scientific visualization within the DoD, makes visualization technology available to DoD researchers, and prepares video presentations in support of DoD projects.
http://www.arl.hpc.mil/SciVis/

Landrum and Brown Visualization
3D modeling, animation, multimedia and video production for architectural visualization.
http://www.landrum-brown.com/visualization/

International Space Visualization Olympiad
Competition in visualization - solve a labyrinth on the surface of different polyhedron.
http://olympiad.fe.uni-lj.si/

Eades, Peter
University of Sydney - Graph drawing, information visualization, software visualization, algorithms.
http://www.cs.usyd.edu.au/~peter/