A very fast net scanner for network admins that can scan your network in the office and export as CSV via GMail to give you a map of what devices are on your LAN
Includes a portscanner for security audit scans and a MAC vendor database to identify NIC manufacturers
Can detect firewalled and stealthed computers, quite useful if you are looking for a windows/firewall box that you can't see on your network!
Useful if you want to find FTP servers, SSH servers, SMB servers etc on your network and would help you to diagnose faults.
You can save the scan results as a CSV file which can be imported into Excel/Google Spreadsheet/LibreOffice
Built for speed and reliability. Throw anything at it and it should cope (even on a 3G network :-)) If you want a specific feature, let me know!