Free Compression Software

7-Zip 7-Zip is a file archiver with the highest compression ratio. The program supports 7z, ZIP, CAB, RAR, ARJ, GZIP, BZIP2, TAR, CPIO, RPM and DEB formats. Compression ratio in the new 7z format is 30-50% better than ratio in ZIP format. Has performed well on Windows. http://www.7-zip.org/

UnzipThemAll Uncompress for free all your .zip, .rar and .ace archive files in one click. Comes with a mass uncompress feature and requires no installation such as Winzip & Winrar. http://www.herve-thouzard.com/modules/wfsection/article.php?articleid=6

FreeZip FreeZip is a small, fast and efficient Zip utility for compression and decompression of files and directories. FreeZip integrates with Windows Explorer and uses file associations and context menus to zip or unzip files and subdirectories. http://members.ozemail.com.au/~nulifetv/freezip/