7-Zip

7-Zip is a file archiver with a high compression ratio, and encryption and fixity check capabilities
Homepage:	http://www.7-zip.org/
License:	7-Zip is open source software [1]. Most of the source code is under the GNU LPGL license [2]. You can use 7-Zip on any computer, including a computer in a commercial organization [3]. You don't need to register or pay for 7-zip [4].
Platforms:	7-zip can be utilized on multiple platforms including Windows 7, Vista, XP, 2008, 2003, 2000, NT, ME, and 98 [5].
Appears in COW:	Appraise email and other large, unstructured text collections, LAC Pre-Ingest Workflow, Workflow for ingesting digitized books into a digital archive

Description

7-Zip is a file archiver with a high compression ratio [6]. You can use 7-Zip on any computer, including a computer in a commercial organization [7]. You don't need to register or pay for 7-zip [8]. 7-Zip works for Windows 7, Vista, XP, 2008, 2003, 2000, NT, ME, and 98 [9].

Most of the source code is under the GNU LGPL license [10].

The unRar code is under a mixed license with GNU LGPL + unRAR restrictions [11]. Check the license for details [12].

Platform

7-zip can be utilized on multiple platforms including Windows 7, Vista, XP, 2008, 2003, 2000, NT, ME, and 98 [13]

User Experiences

7-zip can be used to open an ISO Image File[14].

In order to secure a transfer along untrusted lines, 7-Zip can encrypt containers with AES-256.

For securing fixity: 7-Zip records checksums on compression and verifies them on decompression.

7-Zip can handle containers larger than 2 GigaByte (unlike tools for the genuine ZIP format).

And there is a port of the command line version to Linux/Unix [15].