Putty ( Download | Visit Site )
Simple and easy to use SSH client for logging into shell or your virtual servers.

WinSCP ( Download | Visit Site )
Explorer like file manager using Secure FTP which logs into your SSH server.

FileZilla ( Download | Visit Site )
Freeware but powerful FTP client for you to use to manage files with your web hosting.

FireFTP ( Visit Site )
Free FTP Client addon for the FireFox browser!

3D Traceroute ( Download | Visit Site )
Easy utility to trace and graph the route to your server to see where connectivity is being lost.