Its open source and offered under the GNU Lesser General Public License. 7-Zip fully supports the following seven compression formats: 7z, bzip2, GZIP, TAR, WIM, XZ, and ZIP. Additionally, 7-Zip can extract an additional 24 formats: ARJ, CAB, CHM, cpio, cramfs, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR, and Z. According to its webpage, 7-Zips compression performance for ZIP and GZIP formats is between 2 and 10 percent superior to that of its competition, and our benchmarks support this claim. The app's excellent support for its own 7z compression and archiving format is another strong point. 7z is based on an open architecture with optional 256-bit AES encryption. This format achieved the highest compression rates in our benchmarks. 7-Zip defaults to the Lempel-Ziv-Markov Algorithm (LZMA) for compression with 7z, but it can also be configured to use LZMA2, PPMd, and bzip2. Moreover, it supports WinZip AES encryption, making it possible to create ZIP archives with 256-bit AES encryption. 7-Zip integrates into the Windows Explorer context menus, and it displays archive files as normal folders.
Original article here: http://www.tomshardware.com/reviews/winrar-winzip-7-zip-magicrar,3436-2.html
Compression Performance: 7-Zip, MagicRAR, WinRAR, WinZip - Compression: Your Data, On A Diet
And then the program 7ZIP was also coded by that single person only. Maybe contribute a few dollars to Igor http://7-zipdownload.us Pavlov , the creator of 7Zip ? 30 Hide weatherdude , March 19, 2013 2:24 AM My hat is off to Igor Pavlov (and other contributors?). 7-Zip has been my compression tool of choice ever since I discovered it. With this performance data and it being Free and Open source the Elite award is definitely deserved. Other Comments audi90 , March 18, 2013 10:50 PM One does not simply buy WinRAR... 8 Hide mayankleoboy1 , March 18, 2013 11:06 PM 1. There is no difference between LZMA and LZM2 . Both are the same algorithm. The only difference is LZMA is limited to 2 threads.
Original article here: http://www.tomshardware.com/reviews/winrar-winzip-7-zip-magicrar,3436.html