httpZip 

Port80's httpZip IIS Web server module reduces bandwidth costs, improves site speed, and better leverages server resources. Powerful HTTP compression reduces page sizes for most common file types and automatically addresses browser incompatibilities.
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ZipEnable 

ZipEnable offers fine-grained management of IIS 6.0 built-in HTTP compression for reduced bandwidth, faster pages, and a more efficient Windows Web server. Configure static & dynamic compression for (X)HTML, ASP, JavaScript, CSS, ColdFusion & PHP.
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