There are few handy tools which can be used to trace networking calls. These are very helpful when you make Network Requests and gets response.
1.
Charles is my all time favorite while working with amfphp / http services.
http://www.charlesproxy.com/download/[
^]
2. WireShark comes as my second choice; it really helpful to see inside network packets. It's available free of charge
http://www.wireshark.org/download.html[
^]
3. While working with html UI parts or css or ajax; firebug is very useful addon for firefox. It's power lies in right click menu "Inspect Element"
http://getfirebug.com/[
^]
4. Firefox extension for taking screenshots (with scrolled content)
http://www.screengrab.org/[
^]
