If you're a fan of PuTTY then you'll be pleased to hear that now you can take it anywhere with PuTTY portable.

PuTTY Portable is a Telnet Client and SSH Server for Windows that is packed with features and can be transported anywhere on a USB stick or external storage device. Whatsmore, it's completely free. Firstly however, note that the developer issues a warning on the program website that PuTTY Portable may not be legal in your country so check the law before you use it! Basically, PuTTY Portable allows you to connect to another computer remotely using the Telnet and SSH protocols. So for example, you can install it on a Windows machine and it will connect to a Unix machine. This is great if you are administrator as you can take full control of the machine and work at it remotely. In the PuTTY windows that's opened, you can them send messages to the other machine and vice versa. The annoying thing however is that you have to set up password credentials to instigate this connection. The problem is that the program does not remember the credentials for successive logins. This is understandable for security reasons, but would be very annoying if you`re connecting regularly to an external client.

If you need to control a remote computer and need a client that supports SSH, then PuTTY Portable is a superb option considering that it's totally free and portable.