Integrated Inbox is a free Google Chrome and Firefox extension that allows you to bring all your favorite Google Services to your Gmail Inbox. With Integrated Inbox for Gmail, you’ll experience full integration of all Google web apps—right in your inbox. Everything you use—will be at your fingertips.
Not only can you pick which integrations you’d like from Google Calendar to Google Voice — but you can drag and drop them in any order — until you get your inbox just how you like it.
L’indirizzo del servizio: http://integratedinbox.com/