Portable FileZilla will allow you to carry a whole FTP client with you on an USB thumbdrive, iPod, portable hard drive or any other portable media. You can plug it right into any Windows computer and use it just like you would on your own.
It is a repackaged version of the popular FileZilla FTP client designed with portability in mind, so it has all the same great features of FileZilla, but theres nothing to install.