NetworkActiv Port Scanner
NetworkActiv Port Scanner is a network exploration and administration tool that allows you to scan and explore internal LANs and external WANs. Because of the versatility and choosable operating modes available in NetworkActiv Port Scanner, it may be used by experienced network administrators as... NetworkActiv Port Scanner provides all the basic features that you'd expect in an advanced network scanner, but also provides many additional features and technologies, some of which being completely unique to this scanner.
http://www.networkactiv.com/NetworkActivPortScannerV4.0.exe - 2Mb - Download - Screenshot

Advanced Port Scanner
Advanced Port Scanner is a small, very fast, easy-to-use and robust port scanner for the Win32 platform. It is multithreaded, so on fast machines you can scan ports in very a few seconds. It has descriptions for the common ports and can perform scan on predefined port ranges.
http://www.radmin.com/download/pscan12.exe - 533Kb - Download - Screenshot

Fast Port Scanner
Fast Port Scanner is a fast multithreaded port scanner that scans about 400 ports a second. It supports both the TCP/IP and UDP protocols. You can select address ranges to scan multiple interfaces or hosts. Any open ports will have the any suspect Trojans listed with it. ... This program is free when using Global Up Time website monitoring service.
http://www.globalwebmonitor.com/software/FastScannerSetup.exe - 636Kb - Download - Screenshot

pcSuper Scanner
Ordinary online scanners will only scan for fraction of the ports. Our proprietary pcSuper Scanner is the only scanner in the world that will scan ALL 65,535 ports, TCP server and client as well as UDP. What's more - it will doing this at an unbelievable rate in mere seconds! ... The opened port is only a problem if it was opened by a malicious program. ... No other scanner gets even close. ... In that case you will need pcInternet Patrol to sort it out. ... Ports may be opened by a legitimate program and that is OK.
http://www.pcinternetpatrol.com/downloads/pcscanner.exe - 22Kb - Download - Screenshot

1st Ip Port Scanner
1st Ip Port Scanner ip finder,port finder,ip scanner,port scanner,ip tracer,ip tracker,ip camera all in one software. Find ip address,search ip address,trace ip address,scan ip address,find port,search port,scan port. Full Product Description 1st Ip Port Scanner is a very useful Ip Scanner and... 1st Ip Port Scanner allows for testing the UDP port's status based on ICMP Destination Port Unreachable message. ... Ip finder port finder ip scanner port scanner and ip tracer ip tracker ip camera all in one software.
http://www.1st-soft.com/download/scanner.exe - 1Mb - Download - Screenshot

FreePortScanner
Free Port Scanner is a small, fast, easy-to-use and robust port scanner for the Win32 platform. You can scan ports on fast machines in a few seconds and can perform scan on predefined port ranges. This tool uses TCP packets to determine available hosts and open ports, service associated with... The tool is designed with a user-friendly interface and is easy to use.
http://www.nsauditor.com/freeware/downloads/FreePortScanner.exe - 518Kb - Download - Screenshot

MegaPing
MegaPing is the ultimate must-have toolkit that provides all essential utilities for Information System specialists, system administrators, IT solution providers or individuals. It includes: Scanners: Comprehensive Security Scanner, Port scanner (TCP and UDP ports), IP scanner, NetBIOS scanner,... In addition, Process and Port monitor allows to log errors and informational messages to HTTP log file with different format options. ... Monitors: Host and Port Monitor. ... Security scanner provides the following information: NetBIOS names, Configuration info, Missing Security Patchs,...
http://www.magnetosoft.com/downloads/megaping_setup.exe - 4Mb - Download - Screenshot

easy Look at Net
easy Look at Net is a simple ports scanner, packet sniffer and web-page source loader. Multithread port scanner and packet sniffer specifically made to scan opened TCP ports, packets are filtered by incoming and outgoing, by IP addresses, ports and protocols - TCP, UDP, ICMP, IGMP. ... Besides there is no need in third-party libraries, such as WinPCap, etc. ... Simple web-page source downloader worked via proxy server, if is present in system. ... Utility does not demand installation and is very simple in management that is important for beginning managers of networks.
http://lookanet.com/download/lookanet.exe - 164Kb - Download - Screenshot

Advanced LAN Scanner
Advanced Lan Scanner is a small, easy-to-use, highly configurable network scanner for Win32. And it's fast. It's VERY fast. Advanced Lan Scanner uses multithreading technique, that gives it ability to scan more than 1000 elements per second! If used to scan ports, Advanced Lan Scanner can scan... Also, fast scan is not only Advanced Lan Scanner good feature. ... So, try our freeware program and see, how REAL Lan Scanner must look. ... It also has a powerful export options with script language to describe your own save format!
http://www.radmin.com/download/lscan1b1.exe - 562Kb - Download - Screenshot

NetPenguin
NetPenguin - including following network tools:IP Scanner which can find IP address;LAN Scanner which can scan IP addresses in ethernet LAN;Ping;netstat;Port Scanner;Domain Name Search which can...
http://www.netpenguin.net/software/NetPenguin.exe - 9Mb - Download - Screenshot