I am super-duper impressed with John Haller’s Portable Apps:
The premise of a “portable app” is…I’ll let John tell it:
“A portable app is a computer program that you can carry around with you on a portable device and use on any Windows computer. When your USB flash drive, portable hard drive, iPod or other portable device is plugged in, you have access to your software and personal data just as you would on your own PC. And when you unplug, none of your personal data is left behind”
What John has done is take open-source freeware Windows programs and made them “portable”. Included on the site are:
Well worth a look; I’ve downloaded OpenOffice and Sunbird; I use them almost every day.