With 'ocsinventory-agent --local' (Linux) or 'ocsinventory-agent /local=...' (Windows) you can produce a file which is normally sent to the server. So you have all softwares identified by the agent.
For Windows computers, you can run the systray application and get directly (right click) the inventory details and all softwares.
Obviously, you need to supply more information if REALLY you want help : agent's version, server's version, log for agent, log for server (specially activity.log) ... As you can see lot of requests don't give ENOUGH informations, as people dont REALLY want help : it's a pity