What's On Your Thumbdrive?

Nowadays, we need to support not only people at the office, but friends, family, friends of the family, family of the friends... you name it! They all run Windows to a degree and there are many tools to help you when assisting. Personally, I have a thumb-drive with removable memory cards. One of them has a small bootable Linux, the other one is filled with ready to use Windows utilities (CPU-Z, Ultra-Edit32), DOS utilities I've been collecting over the years, and Unix-style utilities (ps.exe, kill.exe, and others) ported to Windows, without the need for a layer like Cygwin. I also have a copy of the install files for AVG, Spybot, Sygate and the likes. But, even though I think I have many great tools, I'm sure I do not know about a lot of great others to help diagnose and solve problem. So I ask you, what's on your thumb-drive?