It would be nice, though, to have a simple program like Winzip 9 that just works. Stuffit Deluxe 10 (which I upgraded to yeasterday) seems to work, but it has all sorts of add-ons I don't need. I don't like the proprietary .sit/sitx formats, whatever the compression advantages. It will uncompress a lot of formats, but it will only compress in zip, sit/sitx and lha (admittedly, most likely an issue of royalties for formats like rar). And it costs too much for what it does.
Apple's zip support is not a whole lot of use; what if you just want to see the contents of a file without unzipping it? Or verify the integrity of the file?
Zipit may work, but it hasn't been updated since 2002. At that rate, I'd as soon use a command line tool as pay for Zipit.
PowerMac G5 1.8 SP (late 2004), 1.42 mhz 14 iBook Mac OS X (10.4.3) both with 1.5 GB Ram