FileZilla

FileZilla is open source software distributed under the terms of the GNU General Public License .Filezilla is fast and contain a lot of useful features .It is Available for download for free for platforms (windows , linux ,Mac os X ) .

• Easy to use
• Supports FTP, FTP over SSL/TLS (FTPS) and SSH File Transfer Protocol (SFTP)
• Cross-platform. Runs on Windows, Linux, *BSD, Mac OS X and more
• IPv6 support
• Available in many languages
• Supports resume and transfer of large files >4GB
• Powerful Site Manager and transfer queue
• Drag & drop support
• Configurable Speed limits
• Filename filters
• Network configuration wizard
• Remote file editing
• Keep-alive
• HTTP/1.1, SOCKS5 and FTP-Proxy support


FOFF: Free Open FTP Face
FTP client written in python. It is multiplatform, emphasizes on simplicity and ease of use, while providing a rich set of convenience features. Have a lightweight GTK interface.

• Multiplatform - Runs on Windows, *NIX (BSD, Linux, others)
• Modern Interface - Carefully designed using GTK+ 2.x widgets
• Bookmark Manager - Easily manage and test your site connections.
• Image Viewer - View and zoom images with a very fast viewer
• Text Viewer - View readme files or quickly go over text
• Audio Player - Preview audio or create your own playlists
• Compression - One-click gzip compression and decompression
• File Checksums - Easy .md5 file creation and verification
• Terminal Window - Supports OS and FTP commands


YAFC: Yet Anther FTP Client
Yafc is an OpenSource program (licensed under the terms of the GPL.)
Yafc is hosted at SourceForge. Visit the project page.
Features
• cached directory listings
• extensive tab completion
• aliases
• colored ls (ie, ls --color, uses $LS_COLORS like GNU ls)
• automatic reconnect on timed out connections
• recursive get/put/fxp/ls/rm
• nohup mode transfers
• multiple connections open simultaneously
• tagging (queueing)
• very configurable
• autologin and bookmarks
• automagically enters nohup-mode when SIGHUP received (in get and put)
• redirection to local command or file
• proxy support
• Kerberos support (version 4 and 5, heimdal, kth-krb or MIT)
• SSH2 support (sftp)
• it's free!

My fav. FTP client is FILEZILLA and sometime cuteftp.