Cyberduck is an open source FTP and SFTP (SSH Secure File Transfer) browser licenced under the GPL with an easy to use interface, integration with external editors and support for many Mac OS X system technologies such as Spotlight, Bonjour, the Keychain and Applescript.

The latest v3 now supports the facility to get your files to your WebDav and Amazon S3-based site. Simply start Cyberduck, log in and then upload your files.

Although the main interface remains the same, this really is a fantastic free tool for any Mac user. It will enable you to quickly upload files to your homepage, remote server or another remote computer, you can also download from an FTP site, resume broken files and much more.

The latest v3 supports additional features such as QuickLook support, although you'll need Leopard to use this feature.