Time logging service to help you track your reading and writing in email, so that you can include it in your billable hours.Any time you open an email, you'll be able to log how much time you've spent reading it, or writing it. You can then export that information into a spreadsheet, and include that in your billing hours.
cloudhQ. Helping professionals 1 click at a time.
This is an **excellent** service for any professionals who charge hourly like: lawyers, doctors, construction managers, contractors, etc.
Reviews of Gmail Time Tracker by cloudHQ extension