Advanced Port Scanner is a small, fast and easy-to-use Port Scanner for Windows. It is multithreaded, so you can scan ports in just a few seconds. Also, it contains descriptions for common ports, and can perform scans on predefined port ranges.

Scans about 400 ports a second. It supports both the TCP/IP and UDP protocols. Select address ranges to scan multiple interfaces or hosts. Open ports will found will have suspected trojans listed. Free for website monitoring service clients.

See which ports belong to which programs! Port Explorer shows all the open ports on your system and what programs own them. Along with this ability it also has many Werkzeuge including a packet sniffer, bandwidth throttling and country detection.

JFirewallTest is a free Java webstart application that tests for holes or open ports in your firewall. Unlike other solutions, JFirewallTest is a two stage testing procedure that tests all 65,536 ports very rapidly.

AWSPS features a very comprehensive set of Werkzeuge, some of them unique, for in-depth assessment of Network Sicherheit, namely 2 TCP port scanners, 1 UDP port scanner, 1 NetBIOS scanner, comprehensive Local Host and LAN information and much more.

Scans about 400 ports a second. It supports both the TCP/IP and UDP protocols. Select address ranges to scan multiple interfaces or hosts. Open ports will found will have suspected trojans listed. Free for website monitoring service clients.

AVDP is a bundle of three products: AVSD, ANSD and AVUSBD.

Ping Scanner Pro has 18 network Werkzeuge, it can ping one address a lot of times or a lot of addresses one time. It will also tell you what MAC addresses are on your subnet, and perform DNS lookup or reverse DNS lookup. It does Traceroute, Whois.