It's a tool for testing HTTP servers and Web applications. It supports HTTP/HTTPS protocols, GET,POST and HEAD methods, HTTP proxies, refferes and cookies. It's like HTTP Debugger in network tool AccessDiver or HAS.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.