7-Zip is a file archiver with a high compression ratio. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. 7-Zip works for Windows 7, Vista, XP, 2008, 2003, 2000, NT, ME, and 98. And there is a port of the command line version to Linux/Unix. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license with GNU LGPL + unRAR restrictions. Check the license for details.
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Superb for daily compression/decompression, with or without encryption. Contains code which makes brute-forcing decryption more difficult. Great!
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I don't see why everyone always so crazy for WinRaR, this does the same thing.
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Very nice tool for compressing large files. Easy to operate.
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The only substitute for WinRAR
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Excellent tool for archives. May be the best at this time.