Here is our list of some great free and very useful network troubleshooting tools and scanners that all network engineers need to have in their tool kit.  This list is by far not all inclusive.  If you know of a great tool that you use and would like to see it listed here, let us know. We'll post a link to it!

Scanning Tools

• IPScan - also known as Angry IP - is a great scan tool:
  ipscan.zip

• Wireshark - previously known as Ethereal has been the defactor standard in free network sniffer applications.
  

IP Address Tools

• WildPackets makes a nice IP calculator that is free and very easy to use:
  

• THEIPADDRESS.COM - What is your ip address?  Find out here!

Online Free Networking Tools

• Network Tools

• Web Based NSLOOKUP

• Code Flux - tools

UNIX/LINUX Tools

• Unzip this file to the root of your WindowsXP hard drive and add the location to your path to get all the famliar unix like commands on from the command prompt:
  unix.zip

UPload Tools - TFTP-FTP

• A good all around tftp server - tftpd32 works well for most situations:
  tftpd32d.zip

• FileZille - free FTP client
  

More applications will be coming!!!