[mey]

This is head and shoulders above Fiddler 2 for giving you a complete picture of what's going on.

[mey]

Some tools I use

  Network
   WireShark (Cross Platform)
   Fiddler 2 (Win32)
     (Inject into SSL Requests)
  Browers Instrumenting
   Firebug (Firefox)
    FireQuery
    FireRainbow
   Html Validator (FireFox)
   Selenium IDE (FireFox)
   LeetKey (FireFox, mucking with URLEncoding/Base64 etc)
   Internet Explore Developer Tools (IE of course)
   Chrome's built in tools
   Safari's built in tools