ofCourseBooks - Let your students write, save and share their course notes.
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.
Teech - 24/7 Unlimited help from the world's best students
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
GitHub Student Developer Pack - The best developer tools, free for students.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.