I don't like the way OSX extracts zip files without giving you a chance to
preview the contents. And also it only supports zip format. So here is 7-Zip Mac.
- Native Cocoa-based UI following Finder and Mail style
- View contents of archives without extracting
- Preview files by double-clicking
- Supports zip, 7z, rar, tar and bz2 formats
7-Zip Mac contains p7zip
was ported from the original 7zip