Zipeg is free utility for Mac OS X and Windows. Zipeg allows you to quickly and easily open and explore content of zip, rar and other archives, preview files and images before you extract/unzip them. Extract only the files you want. Pictures come to your mailbox as zip archives? Zipeg allows you to decide what do you want to extract. You can choose what to extract and where to put extracted files or just drag and drop them.

great replacement for WinZip and WinRar. Free. Works on Macintosh. open rar files. open zip files. handles pictures