Zipper is a tool for extracting and viewing archive files for GNUstep. It provides the following features:

* Decompression of Tar (.tar.gz, .tar.bz2, .tar.xz), LHA (.lha, .lzx), RAR (.rar), ZIP (.zip), 7z (.7z, .7za), ZOO (.zoo), ACE (.ace) and ARJ (.arj) archives * Archive creation (.tar.gz, .tar.bz2, .tar.xz, .lha, .zip, .7z/.7za and .zoo) * GNUstep "Create archive" service