IP*Works! Zip allows developers to easily integrate compression and decompression functionality into web or desktop applications using popular file and data compression standards including Zip, Tar, Gzip and Jar standards for compression. All IP*Works! Zip components have been built from the ground up entirely in native .NET and Java code, combining exceptional speed, excellent data compression, and extreme portability across platforms.

The components feature password support, file deletion within an archive, streaming compression and decompression, and more. IP*Works! Zip is currently available as fully-managed 100% C# .NET components, or pure Java beans.

http://www.nsoftware.com/products/ipworkszip.aspx