• General Free Courses
• General STEM Reading
• Finance

General Free Courses

• Anna's Archive
• Buddhist University
• Khan Academy
• The MIT Challenge
• The Harvard Challenge
• MIT Open CourseWare

Cheap College Credits (if you must)

• Coursera
• Study.com
• StraighterLine

General STEM

• How to (seriously) read a scientific paper

Finance

• Financial Markets Microstructure