Using this facility you can log in to Achilles using a useful java appplet called Mindterm. This is in no way completely secure however. While, being a Secure SHell it will protect against password fishing and the like, I do not belive that Mindterm verifies the RSA fingerprint of the server. So if you want to be completely secure, go to your trusted computer with your trusted copy of Achilles' public key. However for most purposes this level of security should be fine.
If the applet does not appear then you most likely are crap or have java disabled in your browser.
Remember, if all else fails, you can still download PuTTY from http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe.
Mindterm is © Appgate Network Security and is released, while for free, under the terms of its own license. The source code is, however, available for download.