One of my favorite applications is PortableApps. I have mine on a USB on my key chain at all times. It has all my favorite utilities on it, including Revo Uninstaller, CCleaner, Process Explorer and FileZilla. Just pop the USB into a PC, and all your tools are right there.
And every time you open PortableApps, all your programs are checked for updates, and updated as needed.
You can also log in to your personal accounts in Chrome or Opera, and all your other stuff it there, like your Gmail and Facebook, for example. You can get your email on someone else’s computer without going through the gruesome tasks of opening an incognito/private tab, logging in, and then worrying the rest of the day that you may have forgotten to log out and close the tab.