Eusing Software - 434KB (Freeware)
Free IP Scanner, from Eusing software, is an IP scanner and port scanner. It has been designed for both system administrators and general users to monitor and manage networks. It is powered with multi-thread scan technology, and can scan hundreds computers per second. It simply pings each IP address to check if it's alive, then optionally can resolve its hostname etc.
KEY FEATURES INCLUDE:
Free IP scanner can also display NetBIOS information: host name, workgroup, currently logged user and MAC address. The information obtained can be exported into a file as plain text file. It can scan hundreds of computers per second, so it is ideal for administrators. It can also be configured to scan in many priority levels, set number of maximum threads and so on.