CloudShark is a web application you can use to easy analyze, share and collaborate on network capture files. I like it that is fast and has a clean UI. In fact, if you're familiar with Wireshark, then you'll find it even easier to use since it also supports the same filter syntax. It provides a set of analysis, graphing tools, and a simple but powerful API so you can develop your own applications (e.g. scripts) to integrate with CloudShark.
Airtool