PeaZip is a free file and archive manager, based on solid and proven Open Source technology of 7-Zip for handling mainstream archive formats, and other great Open Source tools (like FreeARC, PAQ, UPX...) for supporting additional file formats and features, in order to provide an all purpose zip utility featuring a powerful unified GUI that, unlike most of other classic file archivers like i.e. WinZip and WinRar, is natively portable and cross-platform.