Have you ever used another computer to find out it doesn’t have a program you really enjoy using? Or, not have it fine tuned to your own style? To avoid situations like these, I always try to carry my pen drive full of Portable Apps.
Portable Apps are programs you can install and run directly from your pen drive, without the need to install anything on the machine itself. The list of applications available is pretty good, including: ClamWin, The Gimp, 7-zip, OpenOffice, VLC, XAMPP, GnuCash, Firefox, Thunderbird, and a couple dozen more.