Hi,
The OMERO.web has a limited ability to view some volumes (see
http://www.openmicroscopy.org/site/prod ... -omero.web) but this is not really designed for confocal images.
We have experimented with providing an orthogonal view of a Z stack (both in the web
http://trac.openmicroscopy.org.uk/ome/r ... Viewer.mov and OMERO.insight) but I guess that's not what you're after.
If you want a "true" volume viewer client for OMERO, you should have a look at the "Volviewer" from the John Innes center
http://cmpdartsvr3.cmp.uea.ac.uk/wiki/B ... /VolViewer. This has been built as an OMERO client, although I don't think the downloads provided above have the OMERO client functionality. If you're interested in using this as an OMERO client, let us know (also which version of OMERO you're using and what OS+version you want to use this on) and we'll see what the current status of this is.
I also believe that various ImageJ plugins provide some 3D viewing options, although you'd need to investigate this yourself. We provide an ImageJ plugin for OMERO, so you can open images in ImageJ and if you find 3D plugins that work for you, then this could be a valid option.
Cheers,
Will.