Determining the software list on machines in my network

Hi All, I am struggling to correctly define a search for a tool to help me list the software in my two machines, desktop and notebook, both running SUSE 12.3. As a consequence Google has been of no help. My two computers have different video handling set ups. desktop needs VLC to handle flash and avi files - nothing else works, whereas my notebook needs GnomeMPlayer only for the same tasks (VLC is useless) both machines are 64bit. I will soon be upgrading to SUSE 13.1 and I would like to have a consistent inventory in each machine. Apart from that, video in SUSE is hard to set up (go figure), so I would like to pre-specify the package list. Andrew Greig