Transmit (previously Transit) is an excellent FTP (file transfer protocol) program that allows you to upload, download, and delete files over the internet. Hot features include the ability to resume failed downloads where you last left off, drag and drop, contextual menu power, folder synchronization, multithreaded, and much more.
Version 1.7 focuses largely on our Mac OS X effort. It features a fully Aqua interface, Mac OS X-style multitasking, improved stability, handy wheel scrolling, live resizing, and support for long filenames (currently upload-only)!
PowerPC, Mac OS 9.0 or later