Network Scanner is a free multi-threaded IP, NetBIOS and SNMP scanner with many advanced features. It is intended for both system administrators and general users who are interested in computer security. The program performs ping sweep, scans for opened TCP and UDP ports, resource shares and services.
For devices with SNMP capability available interfaces are detected and basic properties displayed.
In addition you have to edit results, save/load results to/from CSV and print network device list.
It can also resolve host names and auto-detect your local IP range.

Scan features:
Network neighbourhood
Ping
IP Address
MAC Address (even across routers)
MAC Vendor
Device name
Device domain/workgroup
Logged user
Operating system
Device description
Type flags (SQL server, Domain controller etc.)
Remote device date and time
Listening TCP and UDP ports and SNMP services.
Installed services on device
Shared resources