UnZip 5.32 is based upon the cross-platform, open source zlib project. UnZip is a popular alternative to ZipIt that isn't quite as feature-filled (it doesn't zip, for one - although the separate MacZip companion application does) but some claim is faster. It also supports password-protected archives, which is a feature ZipIt lacks. Both UnZip and MacZip are completely free, to boot.
Can't find what you're looking for? Try a search:
Also, if you have an older Mac, be sure to check out the "Classic" applications page for more options.
Finally, take a look at ALEMIA if you think you know that name of an application, but aren't quite sure.
No, I don't accept reviews anymore for these older applications. With the creation of this page in the Orchard's late 2005 redesign, I only accept reviews for currently-developed applications that work on Mac OS X (or later....whatever that might be!!).