I’ve been using LeapFTP all these years because it is the lightest, simplest FTP client on the web (paid, however). I thought nothing could come close to it until I came across FireFTP over the weekend. It’s simpler than LeapFTP, it’s free and what makes it great is that it plugs right into your browser and has an auto-resume feature built-in
If you do download and use FireFTP please donate at least $1 for a very noble cause.