Google has updated Gmail with tabbed inbox on on desktop and mobile versions.
On the desktop, the new inbox groups your mail into categories which appear as different tabs. You simply choose which categories you want and voilà! Your inbox is organized in a way that lets you see what’s new at a glance and decide which emails you want to read when.
You can easily customize the new inbox – select the tabs you want from all five to none, drag-and-drop to move messages between tabs, set certain senders to always appear in a particular tab and star messages so that they also appear in the Primary tab.
In the Gmail for Android 4.0+ and Gmail for iPhone and iPad apps, you’ll see your Primary mail when you open the app and you can easily navigate to the other tabs.
The new inbox is rolling out gradually. The desktop, Android and iOS versions will become available within the next few weeks. http://gmailblog.blogspot.ca/2013/05/a-new-inbox-that-puts-you-back-in.html