7Zip is an open source archiving utility currently supporting only Windows platform. It fully supports 7z, ZIP, GZIP, BZIP2 and TAR formats.

PeaZip is an open source file and archive manager.

Bandizip is a free Zip Archiver. It extracts the most popular compression formats, including Zip, ZipX, 7z, and RAR files.

B1 Free Archiver is a multi-platform file archiver and file manager.

WPN-XM is a server stack for PHP development on Windows.

Bitser is free Windows software for managing archives and backups. It supports ZIP, 7Z, RAR, ISO, MSI, VHD, GZIP, BZIP2,TAR, LZMA, LZMA2,etc.

WinRAR is archive tool mostly focused on RAR format but also supports common archive formats.

IZArc is a utility that will decompress tons formats like ZIP and RAR.

FreeArc is a free and open source file archiver.

PowerArchiver is a file archiver for Microsoft Windows.

Zipware is simple and free zip software for Microsoft Windows that supports all major archiving formats.

Free Opener opens a large variety of files without any hassle.