QFX Software’s Keyscrambler is a free utility for Microsoft Internet Explorer and Mozilla Firefox that encrypts keystrokes in the kernel driver against known and unknown keyloggers & protects your saved login usernames & passwords in any web browser from being hacked. After encryption, when the scrambled keystrokes reach your browser, KeyScrambler decrypts them so that you can see the keys that you’ve typed. Keyloggers can only record the encrypted keys, which are completely indecipherable to the naked eye.

Download Keyscrambler for IE and Firefox here

You can also try Trend Micro’s secret on screen virtual keyboard for IE and Firefox here