#8 7-Zip:

7-Zip is considered as the best compression tool available outside Linux world. The best part of this tool is that it’s a open source tool and works on all platforms. The software can be operated only using 7z archive, but it can read and write several other formats which can be archived.

Developed by Igor Pavlov in the year 1999, 7-Zip is also one of the oldest compression utilities available till date. The program can be used from a command line interface, graphical user interface, or with a window-based shell integration. There is also a cross platform of the original available, p7zip.

The core .7z compression uses a variety of algorithms, the most common of which are bzip2, LZMA2, and LZMA. LZMA consists of a large LZ-based sliding dictionary up to 4 GB in size, backed by a range coder.

The utility works under GNU Lesser General public License (LGPL). In 2007, 7-Zip won the community choice award for ‘Best Technical Design’ and ‘Best Project’ by SourceForge.net.

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