Graph your inbox: Chrome extensions

This is interesting extension which shows your gmail uses over time.
http://ajabgajab.blogspot.com/2010/09/graph-your-inbox-chrome-extensions.html
The extension is:
https://chrome.google.com/extensions/detail/lghnjmocfihonjdijomigppjlpdgdeji#

Example they show on trends for keywords

This visualizes the gmail use and puts into the context of how your communication with particular person has been going over time. I looked over few and was amazed to see the trends.
Although I thought that I did not use the facebook a lot, it shows the notifications that I get from it.  Showing that I do do facebook.

 Mostly, s/he posted this on the wall, tagged, this guy played this game etc etc.

Analyzing inbox is fun and gives some reflections on what you have been doing with your gmail.