Description: A freeware program with these basic tools: DNS Tools, Ping, Ping Scan, Graphical Ping, Traceroute and Whois. Additional description on this page.

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Operating System: Windows 7/Vista/XP/2003/2000.
Installer: Full install/uninstall. Run the install program inside the zip file. See readme.txt in zip file or Help file for freeware license.
Trial Period: unlimited.
Cost: $0
File name: nstb200.zip (1869K)
Current Version: 2.00, released 14 January 2010.

IPtoMAC

Description: A freeware program designed to find the MAC Address of any IPv4 device on your local network (subnet) even if that device is protected by a personal firewall.

MAC address has been altered in this image.

Operating System: Windows Vista/XP/2003/2000.
Installer: Full install/uninstall. Run the install program inside the zip file. See readme.txt in zip file or About window for freeware license.
Trial Period: unlimited.
Cost: $0
File name: iptomac100.zip (1952K)
Current Version: 1.00, released 1 October 2008.

ENUMresolver

Description: A freeware program designed to query your default DNS for the ENUM NAPTR mapping between a telephone number and a SIP, H323, IAX2 or other URI. Use with VOIP systems to check your e.164 or freenum or other mappings. This program queries each default DNS assigned to your system using the e164.arpa or other root tree for the corresponding NAPTR records and displays them.

Click to view larger image.

Operating System: Windows 2008/Vista/XP/2003/2000.
Installer: Full install/uninstall. Run the install program inside the zip file. See readme.txt in zip file or About window for freeware license.
Trial Period: unlimited.
Cost: $0
File name: enumresolver200.zip (440K)
Current Version: 2.00, released 19 Nov 2008.