Here's a zip file containing nicely formatted screenshots of most of the items in the game:
http://www.sharebigfile.com/file/28235/nomad.zip.html
If you use a hex editor to look in the INVENT.DAT file that comes with the game, it seems to contain embedded files 'inv0001.stp' through 'inv0254.stp'. I'm not familiar with any STP file format, so it's likely a proprietary format created by the game developer.
The package of screen shots linked to above contains 235 items, so I suppose it's possible that there are up to 19 more that I haven't discovered. Most of the really weird ones (Ancient Rocketskate, Brass Glass) were brought up from previously-inhabited worlds by Arch-Bots.
--Colin