CrossFTP is a free and excellent GUI FTP client for multiple platforms. It uses a familiar, Explorer-like interface so that the novice user can master in minutes. Please start the downloaded item by Java Web Start (javaws).

CrossFTP Features
Multiple tabs for local and remote file browsing
Archive browse, extraction, and compression.
CrossFTP Server launcher
I18n support
Image Viewer
Recursive File transportations.
File Filtering;
Auto-reconn and anti-idle,
and bit more...