Well, this is a Chrome plugin. And yes you can write your own. Check out https://developers.google.com/gmail/ https://developers.google.com/gmail/ and http://gm

Well, this is a Chrome plugin. And yes you can write your own. Check out https://developers.google.com/gmail/ https://developers.google.com/gmail/ and http://gmailblog.blogspot.in/2010/02/gmail-chrome-extensions.html http://gmailblog.blogspot.in/2010/02/gmail-chrome-extensions...