Features:
Easy to use
Supports FTP, FTP over SSL/TLS (FTPS) and SSH File Transfer Protocol (SFTP)
Cross-platform. Runs on Windows, Linux, *BSD, OSX 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
Directory Comparison
Network configuration wizard
The ability to use Notepad or any other program to edit a file online (the real action behind the scenes: downloading it to a temporary place and re-uploading it upon saving)
HTTP/1.1, SOCKS5 and FTP Proxy support

New features:
Synchronized browsing
Configurable double-click action for file lists
Ask user to select an editor if trying to edit an unassociated file type

2009-02-20 - FileZilla Client 3.2.2 released
Bugfixes and minor changes:
Display password prompt if connecting to sites with Ask or Interactive logon type through bookmarks
Fix parsing of default remote directories in site manager if using non-default server type

Home Page - http://filezilla-project.org/