7-Zip offers a viable alternative to other compression software. It's fast and offers wide-ranging OS compatibility.
Platform: Windows XP, Windows Vista, Windows 7 64-bit, Windows 7, Windows Vista 64-bit
License: Open source
If you've ever used the likes of WinZip and WinRAR you'll know what to expect from 7-Zip.
7-Zip can packages files into a variety of different compression formats, these include: 7z, ZIP, GZIP, BZIP2, and TAR. In addition it can unpack ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z.
When compressing into ZIP and GZIP formats, 7-Zip can achieve a compression ratio that is 2-10 per cent better than those provided by its nearest competitors.
7-Zip works on just about any computer and doesn't require registration or payment. It also comes bundled with an alternative command line version.
The software is open source and available with support for up to 87 different languages.