RESTed allows developers to quickly format and make HTTP requests and view the response.
NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows.
Advanced Web Debugging Proxy for Mac & iOS
HTTP proxy / HTTP monitor / Reverse Proxy
Graphical Http Client is a utility to help you test and interact with REST-based web services.
RESTClient can be used to test variety of HTTP communications and RESTful webservices.
James is a HTTP Proxy and Monitor that enables developers to view and intercept requests made from...
Download HttpFox for Firefox. An HTTP analyzer addon for Firefox
HttpWatch: The ultimate HTTP Sniffer for Chrome, IE and iOS
Fiddler is a debugging program for websites.
WDT - Web Developer Tools is a suite of useful tools for web developers