From Maxum Development:
If you need to allow people from within your office or across the Internet to send, receive, and manage files on a central Mac, Rumpus FTP is what you are looking for. Whether you need to accept graphics files from remote locations, manage content on a Web server, or coordinate a work group with a single file server that everyone can access, Rumpus is the answer. Rumpus FTP can handle virtually any Internet file transfer task by working with standard FTP and Web clients on any platform, and do it with remarkable ease.
What's new in this version:
Installation and management of software components (the server daemon, SSL tunnel, and remote control daemon) has been revised for improved reliability under OS X 10.5 (Leopard). A bug in sending event notices which use the file name and path tokens in the message subject for multi-file uploads has been corrected. Made minor changes to WebDAV directory listing XML for improved Finder compatibility.