ZipForge.NET is .NET ZIP component with 100% PKZip format support, zip / unzip, repair, streaming support, transaction system, ZIP password protection, progress indication and other useful features. 100% managed code. ZipForge .NET is free for personal use .NET Zip component written in pure C#. Fulls source code is available.
FlexCompress.NET is a high-speed
compression and encryption .NET component
designed to provide archive functionality for your applications. This solution provides flexible compression and strong encryption algorithms that allows you to integrate archiving or backup features into your programs in a fast and easy way.
FlexCompres.NET uses its own file format which allows to achieve better compression rate than WinZip and RAR.