7-Zip and ZIP Reader

Free Unzip Software
What is 7-Zip File Manager?
Unzips (extracts) any archive file: 7z, zip, xz, bzip2, gzip, tar, wim, arj, cab, chm, cpio, cramfs, deb, dmg, fat, hfs, iso, lzh, lzma, mbr, msi, nsis, ntfs, rar, rpm, squashfs, udf, vhd, wim, xar, z
Zip (compress) to archive file: 7z, zip, xz, bzip2, gzip, tar, wim
Compress to Zip and gzip format 2-10% better than other Zip programs including PKZIP and WinZip
Compress 30-70% better than Zip format using 7-Zip format (.7z)
Strong AES-256 encryption in 7z and Zip formats
Self-extracting capability for 7z format, Integration with Windows Shell, Powerful File Manager
Localizations for 79 languages

What is ZIP Reader?
Unzips (extracts from) any archive file: zip, zipx, exe, arj, bz2, tbz, bz, cab, gz, tgz, lzh, lha, rar, tar, tbz, tgz, z, hqx, uue, xxe, jar, war, ear, pgp, gpg
Decrypts SecureZIP files

ZIP Reader is a free Windows utility that allows users to open files that have been compressed using any ZIP product. In addition, it can decrypt files that were created using SecureZIP or PKZIP on any supported hardware platform. ZIP Reader users on Windows can access files encrypted and compressed on Windows, UNIX, Linux, i5/OS, and z/OS systems.