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Data Compression

Listings
7-Zip is open source software. Most of the source code is under the GNU LGPL license.
http://7-zip.org/
Applet is a consultancy company that design, plan, develop, implement and test internet based systems.
http://applet.dk/
This free zip software and unzip software lets you create, open and modify ZIP files quickly and easily, as well as list and extract files in the ZIP file.
http://camunzip.com/
Discover the benefits of using third party components for your next C/C++, .net, silverlight, WPF, WCF, WF or VB development project.
http://imaging-components.com/
Jet-Software, a software house in Germany, with products for mainframe, midrange and mini systems.
http://jet-software.com/
Data security software from PKWare secures data files at rest and in transit with passphrase or certificate-based encryption and cross-platform capability.
http://www.pkware.com/
A leader in date & time testing tools, hierarchical storage management, secure & reliable file transfer and tape-out optimization.
http://solution-soft.com/
Xceed home page has WPF, silverlight, .net and activex controls, datagrid and zip for .net information.
http://xceed.com/
ZBit Inc. is the honest software development site. Instant purchase of world famous compression components and web chat software and many other ASP and ASP.NET solutions.
http://zbitinc.com/