Expresso:
A tool to help with Regular Expressions. This tool has come in very handy in the past with Regular Expressions. Click here to download.

File Archiver:
Service for archiving files to another location. Click here to download.

PuTTy Client:
A Telnet and SSH Client. This is a free client application that you can use to access any CISCO device. Click here to download.

Soap UI:
A very good tool for testing webservices. I have used it for testing WCF services before actually writing the code for it. You can also provide this as a test client to any customer who wants to integrate to your own service. Click here to download.

SolarWinds TFTP Server:
A great utility for downloading configurations to various CISCO devices. Click here to download.

Web Speed Test
Test the upload/download speed of your web connectivity. Click here to go to the site.

WhoIs
A good helper site for finding information about any Domain. Click here to go to the site.