MOApp’s myMailBoy is the cutest way to keep an eye on your inbox.
Working in fullscreen mode (thanks to MenuAndDockless for example)? Working with hidden Dock?
Unhappy with the tiny Dock badge of Mail.app? Simply need more information than an unread count?
That’s when myMailBoy comes into play. myMailBoy periodically searches for new unread messages in your Mail.app Inbox and displays them incl. preview in an unobtrusive HUD on top of all other Apps - enabling you to decide what to do next.