[aaront]

A little site to help university/high school students speculate what they need on exams to get a certain grade in the course, or vice versa: http://calcmymarks.appspot.com/

Really just a hobby, something created out of my nervousness when preparing for exams, but I've gotten some good usage from people at my university.

[orky56]

Have you checked out the iPhone app, Grades 2? Same concept but a lot more powerful in terms of the other features.