Power Planner - Record homework and class schedule.
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
MyHomework - myHomework is an app where students can manage their school life.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Helium Student Planner - Helium is an online student planner that lets you organize and color-coordinate your schedule and schoolwork, capture details about every assignment, and plan your study time efficiently.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.