7-Zip 4.51 beta

They keep pushing beta releases out at a fast rate, so I can’t post them all 🙂 But here’s a new 7-Zip! 7-Zip is a file archiver with a high compression ratio. The program supports 7z, ZIP, CAB, RAR, ARJ, LZH, CHM, GZIP, BZIP2, Z, TAR, CPIO, RPM and DEB formats. Compression ratio in the new 7z format is 30-50% better than ratio in ZIP format. It also compresses to ZIP 2-10% better than PKZip and WinZip. It has an additional powerful command line version and FAR Manager support.

Changes in version 4.50 beta:

* New switch for command line version:
-ssc[-] enables/disables case-sensitive mode for file names.
* Speed optimizations for AES encryption.
* Some bugs were fixed.

Version 4.49 beta 2007-07-11
– 7-Zip now can unpack WIM archives
– 7-Zip now replaces incorrect characters in filenames during extracting.

Version 4.48 beta 2007-06-26
– Encryption strength for .7z format was increased.
Now it uses random initialization vectors.
– Some bugs were fixed.

Version 4.47 beta 2007-05-27
– Bugs of 7-Zip 4.46 beta were fixed: BZip2 could work incorrectly.

Version 4.46 beta 2007-05-25
– New fast compression mode for Deflate method in Zip and GZip.
– New “Compress shared files” option in GUI and -ssw switch.
– Some bugs were fixed.
– New localization: Norwegian Nynorsk.

>> Download 7-Zip 4.51 beta
>> 7-Zip website

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