4 Portable FTP Clients

URL & Download : WinSCP Portable Edition.
Description : WinSCP Portable Edition is the WinSCP SFTP and SCP client for Windows packaged with an OTBSoft Launcher as a portable app.
Download Size : 1.4mb.
OS : All Windows only.

URL & Download : FileZilla Portable.
Description : FileZilla is one of the most popular (and, possibly the best) FTP clients, the portable version does have less features than the full version. Even with less features it is still a must Download.
Download Size : 3.2mb.
OS : All Windows only.

URL & Download : Portable SmartFTP.
Description : This portable FTP client is much smaller in size than all the rest of the FTP Clients, and it shows. Features are limited, but if you are short of space on your drive it could be useful.
Download Size : 640kb.
OS : All Windows only.

URL & Download : CyberDuck FTP.
Description : Portable Cyberduck is the Cyberduck FTP and SFTP (SSH Secure File Transfer) browser with an easy to use interface, integration with external editors and support for many Mac OS X system technologies such as Spotlight, Bonjour, the Keychain and AppleScript.
Download Size : 9.9mb.
OS : MAC OSX only.