Ask the Readers: What’s In Your Flash Drive Toolkit?

Flash drives loaded with diagnostic apps, portable tools, and other goodies have become a significant part of most geeks’ computer fixing tool kits. What’s in your kit?
Photo by Russell Jones; check out his great guide to DIY armored flash drives here.
This week we want to hear all about the contents of your flash drive. What tools do you have squirreled away in there? What do they do? Which ones have really saved you in a time of need?
Come Friday we’ll round the responses, compile a list, and share all your favorite tools with the greater How-To Geek audience. The more detailed your list and description the better chance we’ll share your tool kit goodies.