a-Change Mac Address
Change Mac Address in seconds! Scan Mac Address within any range of IP address. Exports the scanning results from a Mac Address Lookup list. Spoofing the Mac Address of your network card to any new Mac Address. It makes ping mac address possible. Use this mac address finder to search proper mac... It checks your Mac Address inputting. ... It scan any range of IP for the proper Mac Address. ... ) It support changing mac address searching speed. ... It is not only a mac address scanner but also a spoofer.
http://amac.paqtool.com/images/amac.exe - 689Kb - Download - Screenshot

SMAC
SMAC is a powerful, yet easy to use MAC Address Changer for Windows 2000, XP, and 2003 systems, regardless of whether the manufacturers allow this option or not. The new MAC addresses you change will sustain from reboots. Features: Change MAC Address in 3 clicks || validate MAC Address ||...
http://www.klcconsulting.net/smac/default.htm#download - 5Mb - 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

ArpCacheWatch
ArpCacheWatch monitors Windows ARP cache and allows to send an ARP request to obtain the physical address that corresponds to the specified destination IP address. The ARP cache contains IP/MAC translations so that every time an IP packet are to be sent, the MAC address doesn't have to queried...
http://www.nsauditor.com/freeware/downloads/ArpCacheWatch.exe - 647Kb - Download - Screenshot

IP Address Searcher
IP Address Searcher is a powerful IP Address Search tool that helps you to search IP address, list all IP Address on your network, ping a host, trace IP, get MAC information, search a ip geographic location. Features:1). List ALL IP address of PCs on network. ... Get ALL netcard(MAC) information on your computer. ... Get IP address of a specific host or a website. ... Get host name of a specific IP address. ... Trace a specific host or website, and display the location of routes and display it's location and IP network segment.
http://www.mjksoft.com/downloads/ipas.zip - 2b - Download - Screenshot

WinSuperKit
WinSuperKit is a powerful network toolkit that is used to list ip address and MAC address of all PCs on network neighborhood, find ip address of a special host or host name of a specail ip address on internet or intranet, ping a host, trace routes and display the geographical location of the ip... List a range of ip address to get their host name, MAC address and other on your Network. ... List all ip address, host name, MAC of on your Network Neighborhood. ... IP Address Search ----------------- 1).
http://www.qwerks.com/download/4808/wsk.zip - 13Mb - Download - Screenshot

PingCOPA Ping and Traceroute
PingCOPA, is an aid to network engineers when monitoring and diagnosing network problems. PingCOPA installs on all 32 bit Microsoft Windows operating systems (except 95). Speech is only available on systems with the Microsoft Text-to-speech engine installed. ... You can associate a snapshot or alarm with any IP address and both will automatically monitor the address when it is Pinged. ... All addresses are automatically resolved to a URL where possible, and a MAC addresses lookup feature is provided.
http://www.intervations.com/download/pingcopa/_pingcpa.exe - 2Mb - Download - Screenshot

NetInfo
NetInfo is a collection of 15 different state-of-the-art network tools on a single, easy-to-use interface. Designed from first-hand experience, NetInfo allows businesses to more effectively combat network downtime by allowing network administrators, webmasters, and Internet service providers to... Main features: displays system IP addresses and MAC addresses, displays all local TCP/IP connections and their foreign connection IP address, allows you to quickly verify network connectivity to another IP address on the network, displays a list of routers between your system and the destination...
http://netinfo.tsarfin.com/downloads/netinfo.zip - 2Mb - Download - Screenshot

NSNICAddress
An ActiveX control that will validate a MAC address. Nice configurable GUI.
http://www.nightshift.co.za/download/nicaddress.exe - 74Kb - Download - Screenshot

wodDHCPServer
General information wodDHCPServer is a DHCP server component (Dynamic Host Configuration Protocol), available as COM object and ActiveX control. It provides a framework for passing configuration information to hosts on TCP/IP network. wodDHCPServer implements protocol specific infrastructure,... You will find here client's MAC address (usually your choices will be based on this information), and setup network parameters directly by populating this object information (Hostname, Gateway... ... Once they receive this information, clients can choose among received offers, and Request the IP...
http://www.weonlydo.com/Samples/wodDHCPServer.exe - 839Kb - Download - Screenshot