7-Zip is a file archiver with a high compression ratio and is open source software. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license: GNU LGPL + unRAR restrictions. Check license information here: 7-Zip license.
What"s new:
- 7-Zip now supports PPMd compression in .ZIP archives.
- Speed optimizations in PPMd codec
- The support for archives in installers was improved.
- Some bugs were fixed.
- New localization: Kazakh.