Zipeg is free unarchiver for Mac OSX.
Extracts from RAR, ZIP and many other file formats.

Zipeg opens and explores content of zip, rar, arj and other archives, preview files and images before you extract/unzip them. Extract only the files you want.

Using Zipeg you can double click on the item and automatically open the document in Preview or your preferred application before you extract it.

You can choose what to extract and where to put extracted files.

See what`s inside BEFORE you extract; open files in Preview directly from the archive; see image thumbnails (EXIF) in tooltips; extract items simply by dragging them; easy-to-use user interface; resource fork and Finder attributes support for Mac; decode filenames in your national alphabet; Windows version is available (visit www.zipeg.com); archives are processed in background; supports variety of archive formats ZIP, RAR, ARJ, 7-zip, TAR, GZ, GZ, BZIP2, CPIO, LZH and more.