Biovision technologies, Inc (http://www.biovis.com) provides 2D and 3D software deconvolution packages, along with digital imaging hardware (cameras, motorized drives) systems. They also resell Roper Scientific and other cameras (some firewire).
Autoquant imaging, Inc (http://www.aqi.com) provides 2D and 3D software deconvolution packages and a "visualization" tool that lets you rotate around 3D views.
VayTek, Inc (http://www.vaytek.com) provides microscopes and peripherals, stage control software, 3D visualization software, and deconvolution algorithms. They have a page listing comparisons with those they see as competitors for the deconvolution at http://www.vaytek.com/soft4.htm.
Scanalytics, Inc (http://www.scanalytics.com) provides software to control cameras and a set of analysis software that includes deconvolution software.
ScienceGL (http://www.sciencegl.com) provides a number of visualization tools in 2D and 3D, including visualization tools for the display of confocal microscope images.