Microsoft Fiddler is an HTTP Debugging Proxy that logs all HTTP traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP traffic, set breakpoints, and fiddle with incoming or outgoing data. Fiddler is designed to be much simpler than using NetMon or Achilles, and includes a simple but powerful JScript.NET event-based scripting subsystem.
Version 1.2 adds an auto responder tab.
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[tags]debug, http, proxy, NetMon, Achilles[/tags]