Provide analytics based on your gmail activity. Scan your entire emails archive and shown most frequest email senders.
To run this application you need to get a Client Id for Google API. You can get one at https://console.developers.google.com/.
As I realized after implementation was finished, Gmail API isn't the best tool for such application. There is strict limitations which are hard to bypass and although Gmail API is great it's still worse than IMAP for this task. I keep this script as is for future reconstruction.
MIT (c) 2014 Artem Volkhin