Xceed Zip for .NET 

Xceed Zip for .NET is a 100% managed data compression and all-purpose file manipulation class library for .NET. It provides flexible zip, unzip, streaming, self-extracting and an innovative and extensible filesystem object model.
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SCML LABEL PRINTER .NET 

SCML Label Printer .NET is a DLL that allows .NET programmers to print and preview labels on ink-jet and laser printers (159 label types).
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SharpSpell 

Artificially Intelligent Spell Checker component for the .NET framework. Supports both ASP.NET and Windows.Forms within the same assembly. Includes English, German, French, Spanish and Italian dictionaries, with full support for new languages.
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