FileZilla

Filezilla is one of those great FTP clients that give you all you need to manage your multi FTP account without racking your brains. FileZilla offers you the most common options to upload and download data from /to your FTP server and some advanced features. You will be able to admin all your FTP accounts from the same program with no problem, you will be able to Drag&Drop, queue files and even resume transfers. In short, a very good choice if you have several FTP accounts... And even if you have only one.