Everstudent Planner is connected with Evernote, the popular and well-done organizational/productivity app. Everstudent allows you to track classes, color code assignments, set reminders, add professor contact information, and sync up your daily to-dos with all your devices, or even share with friends.
Locale makes your phone aware of your surroundings. You can set it to go to silent when you go into court or the classroom, have it detect Wi-fi when you enter the library, or change the wallpaper when you get home. You set the surroundings, and it remembers what to do when it is there.
Planner Pig gives students the ability to track their study habits and gives you options about how to best spend your time while prepping for finals. You can determine how long you should study, calendar your progress, review your studying history and much more.