Fugu
Fugu is a SFTP client for Mac OS X. It was developed by the research systems unix group at the university of Michigan.
Unfortunately, it seems development has ceased and the latest builds they offer on their website are some 5 years old. In particular, they require Rosetta to be installed. Fortunately, they provide the source code of Fugu, so with a few minor changes I compiled new versions of Fugu that run natively on Mac OS X 10.5 (Leopard) and 10.6 (Snow Leopard).
Just to emphasize: I did not develop this program, all credit / blame goes to the guys at UofM :-)
I just provide an updated build of Fugu that runs natively on newer versions of Mac OS X and Intel hardware.
If you have any questions regarding those builds, please let me know at alexander(at)wittig(dot)name. Note that I cannot help you with problems about how to use Fugu
System requirements
The downloads below will only work with Mac OS X 10.5 and up. They are 32bit Intel builds only, if you need PPC versions, get them directly from the Fugu website.
Download
Fugu.zip (32 bit Intel, International [Chinese, Danish, Dutch, English, Finnish, French, German, Italian, Japanese, Spanish])