This is a student homework planner for Windows Phone 7. I created it since there were no good homework apps on WP7 and I needed one, and I'm sure everyone else would love to use it too!
Power Planner has a unique feature where it automatically schedules reminders for you. At the end of your day (10 minutes after your last class), Power Planner sends you a reminder telling you what items you have due for tomorrow. Also, if you don't finish an assignment before it is due, Power Planner will remind you an hour before that class, telling you that you have incomplete items.
The app also has an excellent interface that makes adding assignments super fast. When adding homework assignments, you can simply press the "return" button on the keyboard to jump to the next box on the page. Also, Power Planner remembers your last selected class and due date, so you can quickly add multiple things to the same class faster than any other app.
And Power Planner now has an advanced grading system that allows you to use custom grade and GPA scales, weighted grades, classes with credits, etc!
And Power Planner has the best live tile! You can see when your next items are due without even opening the app!!
Tell me what you think of the demo video, and if you have any features you would like to see added to the app, list them here!
Source: This thread
Price: Free or $1.99 (paid version has a few extra features, but free trial is fully functional and is ad-free)