Bopup Scanner is a free to use network scanner with the power and capability to scan and display all active computers with logged user names in a network.
    Once you use this handy network scanner you will not look for any other tool again. This tool allows you to easily scan and display all active computers with logged user names (NetBIOS), MAC and IP addresses. This tool comprises capabilities to: open all the shared folders on remote computers in Windows Explorer, recognize and display any HTTP (Web) servers running on remote computers, detects all online computers, let you browse all the shared resources of the remote computers, and can save all the results to a text file. The application can be used by the advanced users for entering IP range to scan, specify a timeout that can resolve a remote host and run the program from a command line interface.
    Bopup Scanner, this must to have tool is compatible with Windows 95/98/Me/NT 4.0/2000/XP/2003/Vista.