Program: PSMAntiKeyLogger
License: Open Source/Freeware
Description: PSMAntiKeyLogger is a real-time protecting tool which protects you against not only Keyloggers but also Screen/Form capturers. It can be compared to SnoopFree at http://snoopfree.com.
Website: http://psmantikeyloger.sourceforge.net
Other: Would be useful to have for those who use Firefox Portable, or other such apps in which sensitive data is being typed.
I'm not sure if it can be made portable but if it can, I know that I would use it. Yes, I do realize that you can download addons for Firefox that do this job for me but I like a little extra protection. Paranoid, I suppose.