File Archiver 7-zip
7-zip is open source archiver with the highest compression ratio.
For ZIP and GZIP formats 7-Zip provides a compression ratio that is 2-10% better than the ratio provided by PKZip and WinZip. It has a self-extracting capability for 7z format & integration with the Windows Shell.
Get it on Offifical site OR Sourceforge
The program supports 7z, ZIP, CAB, RAR, ARJ, LZH, CHM, GZIP, BZIP2, Z, TAR, CPIO, RPM and DEB formats.
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