7-Zip

7-Zip is a file archiver with a high compression ratio
Homepage:	http://www.7-zip.org/
License:	7-Zip is open source software. Most of the source code is under the GNU LPGL license. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-zip [1].
Platforms:	7-zip can be utilized on multiple platforms.
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

User Experiences

7zip can also be used to open an ISO Image File[2].