Wireshark for Windows 1.3.1 Beta
Network protocol analyzer for Windows
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Windows
Open Source
Oct 27, 2009 - 4:23 PM

4.8
(140 votes)
Customizable network bandwidth monitoring program for Windows
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Windows
Freeware
Aug 13, 2007 - 5:52 PM

4.7
(144 votes)
Doesn't scan and clean for spyware - it prevents it from ever being installed
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Windows
Freeware
Apr 10, 2009 - 12:21 PM

4.7
(164 votes)
Open source library for packet capture and network analysis for the Win32 platforms
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Windows
Open Source
Jun 12, 2008 - 3:17 PM

4.7
(54 votes)
Retrieve registration information for a particular domain or website
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Windows
Freeware
Aug 20, 2009 - 3:20 PM

4.6
(43 votes)
Shows all open TCP/IP and UDP ports
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Windows
Freeware
Jun 19, 2002 - 10:13 AM

4.6
(10 votes)
Very Simple Network Scanner 1.4.2.192 Alpha
GUI tool that does a Ping Scan and simply reports all device IP's it found
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Windows
Freeware
Jul 10, 2009 - 5:42 PM

4.6
(10 votes)
Freeware LAN scanner that resolves NetBIOS, MAC, IP addresses, HTTP servers
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Windows
Freeware
Oct 6, 2009 - 4:19 PM

4.6
(16 votes)
Command Line Fast Ping Scanner
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Windows
Freeware
Mar 16, 2009 - 11:27 AM

4.6
(9 votes)
Client for the Uptimes Project that runs as a Windows service
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Windows
Freeware
Apr 1, 2008 - 9:51 AM

4.5
(11 votes)
Software and hardware inventory of your p.c.s
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Windows
Shareware
Nov 28, 2009 - 2:55 PM

4.5
(38 votes)
Website server monitoring, analysis, and notification
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Windows
Shareware
Mar 13, 2007 - 10:49 AM

4.5
(11 votes)
DEKSI Network Administrator 4.62
Network mapping, monitoring, management, and administration software
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Windows
Shareware
Aug 17, 2009 - 12:10 PM

4.4
(7 votes)
Powerful set of IP utilities
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Windows
Freeware
Jun 11, 2004 - 12:37 AM

4.4
(10 votes)
Gather information on devices in a network such as IP, DNS, OS, etc.
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Windows
Shareware
Sep 17, 2003 - 12:11 PM

4.3
(12 votes)