The popular Gmail client app Mailbox started life as an iPhone and iPod touch app, but now has iPad support, too. Mailbox hit the App Store earlier this year and proved to be so popular that users had to sign up on a waiting list to get access to its features. The app has since been bought by Dropbox and the waiting list days are behind us. The app gives users more email organizational control that Google offers, can set reminders to check specific messages later, and more. Mailbox is free and is available at Apple's iTunes-based App Store.
Check It Out: Mailbox, Now with iPad Support