FileZilla - Free FTP Solution

FileZilla Client is a fast and reliable cross-platform FTP, FTPS and SFTP client with lots of useful features and an intuitive graphical user interface.

Features
Among others, the features of FileZilla include the following:
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
Tabbed user interface
Powerful Site Manager and transfer queue
Bookmarks
Drag & drop support
Configurable transfer speed limits
Filename filters
Directory comparison
Network configuration wizard
Remote file editing
Keep-alive
HTTP/1.1, SOCKS5 and FTP-Proxy support
Logging to file
Synchronized directory browsing
Remote file search

2012-02-26 - FileZilla Server 0.9.41 released
Bugfixes and minor changes:
Fix parsing of IP address filters ending with :0 or equivalent substringss.
Allow speed limits larger than 64 MiB/s.
Show more verbose error messages if transfer connection cannot be established.

2012-01-08 - FileZilla Client 3.5.3 released
New features:
Ctrl+Shift+O can be used to toggle between modification time and filesize based directory comparison
Bugfixes and minor changes:
It is now possible to use custom passwords if using "anonymous" as user name
After un-hiding toolbar, update toolbar button states
Fix TLS compatibility issues with TLS 1.2 servers
MSW: Unset hidden attribute on FileZilla's settings files
Building FileZilla from source now requires wxWidgets 2.8.12 or higher.