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Chegg - Save $$ on textbooks. Rent, buy or sell your books today and get 24/7 homework help when you need it with Chegg Study and Chegg Tutors.
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TutorMe - Connect with a high-quality tutor in under 30 seconds
GitHub Student Developer Pack - The best developer tools, free for students.
StuDocu - StuDocu is a document collaboration platform for students.