This free, GPL-licensed FTP browser is a lean, mean, file-managing machine. Cyberduck can communicate with standard FTP volumes as well as SFTP, WebDAV, Google Docs, Google Storage, and Amazon S3. The application easily manages bookmarks with an OS X-styled drawer, and it's easy to import your bookmarks from other file-transfer apps if you want to try Cyberduck out. We like the quick-connect drop-down, which allows you to pop into recently accessed or bookmarked servers in a snap. We generally found both upstream and downstream file transfers to be speedy.
While Cyberduck can be seen as limited in terms of functionality because of its entry-level nature, the program handles basic tasks with ease. Recent updates added numerous interface improvements, Amazon S3 refinements, and a handful of interoperability bug fixes. We recommend Cyberduck to anyone looking for a simple, solid FTP browser.