1)   SiteScan XP - Web Spider & Link Checker 1.1
All-in-one Website Scanner, Link Checker, Response Timer, Browser & Editor. Scan entire websites for broken links, server errors and measure page response times. Analyze individual pages - highlight links in the browser or source code, edit and save.

 2)   httpExplorer 2.1
Used to examine unaltered http requests and responses intercepted with and without proxy. There are several views for the data. Raw view shows the data in bytes. Text view shows the headers in the request and response as well as the http payload.