Portable FileZilla
Features
FileZilla is a fast and reliable FTP client with lots of handy features. It supports resume on both downloads and uploads, timeout detection, firewall support, SOCKS4/5 and HTTP1.1 support, SSL, SFTP and more, all with an intuitive drag and drop interface. Learn more about FileZilla...
Portability Note: FileZilla itself is actually portable without modification. It will be bigger (11.6MB vs 3.3MB) and you'll lose the automatic settings backup and the ability to place the launcher outside the program directory. Just download the ZIP version from the FileZilla website instead of a standard installer.
http://portableapps.com/apps/internet/ftp/portable_filezilla
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