Whether you have your own server, or need to connect to someone else’s, an FTP client can make the process of transferring and managing files that much simpler. Now of course you can open at FTP session in a Terminal window, and it’s also possible in Finder, but I much prefer using a client, so I wanted to list some of my favorite apps that you might also find useful.

• Cyberduck – This is my favorite and one I use often. It has a simple UI, a Dashboard widget to drag and drop, and it’s free.
• Transmit 3 – This is another very popular FTP client, and add a host of features including iDisk support, droplets, copy/preview of remote URL’s, and more. This is a full featured app, but it will set you back about $30.
• Filezilla – This is an open-source project that is also cross-platform. It’s free, and offers all the features most users would need, but the interface needs some work.
• Fetch – Fetch 5.3 has been updated for Leopard, and offers many of the features found in the other FTP clients above. A copy of Fetch is about $25.

All of these applications should take care of your FTP needs, but I would definitely recommend giving Cyberduck and Transmit a try.