Portable Tools

There are times when your test machines may not have all the tools on them that you need to perform a test effectively. Sometimes you're not allowed to install other apps on a system due to a security concern. Luckily, many applications can be run from a flash drive. This lets you get your job done while not contaminating the system. Here's a quick list of some of my most frequently used portable apps. You can download a full suite of programs from PortableApps.com, and many more from PortableFreeware.com

Notepad++ - lightweight editor for pretty much any type of script.
Recuva - lets you quickly recover deleted files.
Wireshark - packet monitoring tool useful when load/performance testing.
PortablePython - a full python development environment on your flash drive.
FoxitPDF Reader - because sometimes, Acrobat just isn't there.
QueryExpress.exe - simple SQL query analyzer look alike.
WinMerge Portable - lets you quickly perform a diff between two files.

What other portable tools do you use?