The only one I know of that specifically bills itself as a planner for college students is StudentLife
They have a 30-day trial. It will set you back $25 if you want to keep it.
Student Life is a personal organizer built with the college student in mind!
Simplify the chaos of college life with this cool student organizer. Student Life contains a class scheduler/information manager to help students schedule their classes and keep important information about the class. It gives you the means to organize all their class notes. It has a degree tracker to allow the student track the progress of their degree(s) along with their GPA/QPA. It has a homework/test tracker to help the student keep up to date on homework assignments/scores and tests/scores. The social life manager helps students keep track of any social activity, to do list, and job scheduling. The contact manager keeps all contact information of friends, family, and classmates. The scholarship and loan manager allows students to track their scholarship applications and student loans. The reminder manager allows the student to maintain all their reminders for any and all activities. The conversion calculator is a great tool for students to use to convert any weight, distance, temperature, volume, or velocity values. The calendar function helps students look at their daily, weekly or monthly schedule. Student Life has all this and the added feature of allowing the student to change the look and feel of the program by setting their favorite "skin". This is a fun and useful tool for ALL students.
My nephew used StudentLife while he was getting his BS in Engineering at Boston University.