Cyberduck is an open source FTP, SFTP, WebDAV and Amazon S3 browser licenced under the GPL with an easy ap;roval use interface, integration with external editors and support for many Mac OS X system technologies such as Spotlight, Bonjour, Va disability claim pending decision approval and the Keychain. I tested this quite extensively under Win aproval. If the transfer was broken the resume just would not function, and files would be re-uploaded from the start again. The interface I found a bit daunting compared to the split screen apps as you would have to be very careful when selecting transfer folders to be sure they went into the right places. WebDAV jandy valve actuator troubleshooting
Amazon S3 performance was quite good, no problems were experienced here.