iHomework is an iPhone app for tracking homework, due dates, courses, reading assignments and more. Let's face it. Many students no longer rely on a simple dead-tree planner.
Beyond that, iHomework can help a student figure out the grade they're currently pulling in a class, which is soemthing that I would've killed for when I was a student. It's incredibly helpful to know that a B on assignment X won't really effect your grade all that much but a B on the next test will.