- Khan Academy (Free videos that cover mathematics and physics from kindergarten level to college freshman level)
- The Theoretical Minimum (String theorist Leonard Susskind 's homepage where you can find free video lectures)
- Physics Stack Exchange, Physics forum (You can ask any physics questions here.)
- The Official String Theory Web Site (website with useful resources for laymen)
- The Elegant Universe (a TV program based on string theorist Brian Greene's book, "The Elegant Universe")
- Project Tuva (Feynman video lectures online by the courtesy of Bill Gates)
- String Theorist Shiraz Minwalla's Bosonic String Lectures (45 video lectures online)
- String Theorist Shiraz Minwalla's Superstring Lectures (21 video lectures online)
- Modern Physics: Special Relativity (8 video lectures online)
- Einstein's General Theory of Relativity (12 video lectures online)
- Modern Physics: Quantum Mechanics (10 video lectures online)
- A theoretical physics FAQ (containing 140 common questions)
- String Theorist Edward Witten's homepage (webpage with articles for both laymen and physicists)
- Abhay Ashtekar: Semi-Popular Articles (articles aimed at the general public, written by Abhay Ashtekar, one of the founders of loop quantum gravity)
- Atoms of Space and Time (an article by Lee Smolin, one of the founders of loop quantum gravity)
- How to become a GOOD theoretical physicist (some pieces of advice by Nobel Laureate Gerard't Hooft)
- MIT OpenCourseWare (Free Online MIT Course Materials)
- Google groups: sci.physics.strings, sci.physics.research (google groups where you can ask questions)