UFxp is a GUI client for FXP.One using the Ultimate widget toolkit. Even though there are clients that come with FXP.One, this is the first full-blown GUI client and is separately packaged. You can download the Ulitmates UPP RPM Ultimate Binaries here.
It works on Windows and Unix servers. Currently tested on NetBSD, Linux, Windows and OsX.
What this project really could need is someone to help with the graphics/buttons and icons. It has too much of a "programmer look" at the moment.