IceFTP is an incredibly user-friendly FTP client with a transfer queue that's able to download multiple files at the same time while still allowing you to browse the FTP site.

-Downloads mp3 music, movies, software and much more.
-Drag and drop interface
-Multi threaded with up to 8 synchronous transfers
-Ability to browse sites while downloading files
-Download from multiple servers at the same time
-Original Napster type interface
-Site manager stores frequently used sites.
-Anti-idle