FileZilla is really kind of "meh," when it comes to user interface. I'm wondering if there's something simpler/cleaner/slicker out there?
FileZilla is the de-facto standard when it comes to an FTP client. It is extremely powerful while remaining very easy to use. You mentioned the user interface, and you're really not going to find much better then FileZilla as far as that. However, here are the top ten most popular alternatives:
Don't forget the FTP client that comes with Ubuntu! It integrates very nicely with Ubuntu, and is very easy to use. You don't have to install any additional software. However, it lacks many of the powerful features that a full-featured FTP client, like FileZilla has.
To use it, go to File > Connect to Server with the desktop selected.
Another option is to use gFTP, a FTP client with a nice graphical interface that is different from FileZilla's, but only slightly. It can be installed through the Ubuntu Software Center or through sudo apt-get install gftp.
Kasablanca is a GUI FTP client intended for use in KDE, but it will work in Unity too. The interface is very simple and it lacks some of the advanced features of more sophisticated FTP clients. It can be downloaded here.
If you prefer a Firefox add-on, FireFTP is a great one that will allow you to transfer files from within the browser. Download it here.
A FTP client for the K Desktop Environment (KDE). It can be downloaded at kftp.org.
GNOME Commander is an FTP client with a very unique interface that supports themes and customization. It can be installed through the Ubuntu Software Center or sudo apt-get install gnome-commander.
Sitecopy is a unique FTP client in that it automatically synches a directory on your computer with a directory on an FTP site automatically in the background. Details at the project's website, which can be found here. Sorry, but I couldn't find a screenshot for this one.
Filerunner is an FTP client with a very basic interface. It can be installed through the Ubuntu Software Center or through sudo apt-get install filerunner.
Konqueror, a web browser for KDE, can access FTP sites when you type ftp://[email protected]/ into the address bar. it can be installed through the Ubuntu Software Center or through sudo apt-get install konqueror.
net2ftp is an online FTP client which lets you upload files from the web browser without having to install any additional software. It can be accessed through net2ftp.com.
Hope that helped. Please let me know if I left any clients out that you think should be included.
