Must Have Tool for ASP.NET Developer
NetFXHarmonics DevServer is a web server hosting environment built on .NET 3.5 using WPF, WCF, and LINQ technologies that allows multiple instances of VS-like web servers to run in parallel. NetFXHarmonics DevServer also includes tracing capabilities for monitoring view status code, date/time, URL, POST data , response data, request headers, response headers, as well as parsed ViewState and Control state for both the request and response, visually enhanced HTTP status codes, IP binding modes for both local-only as well as remote access, and easy to use XML configuration. You can trace text specific files like HTML, CSS, JavaScript, JSON, XAML, Text, and SOAP and their content.
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DevServer Announcement and Overview
[Via David Bet'z Blog]