- David Tong lecture notes
Excellent set of lecture notes on standard undergraduate courses (and more) posted by Prof. David Tong of Cambridge. They can be accessed at: http://www.damtp.cam.ac.uk/user/tong/teaching.html
- Gerard 't Hooft's website
He's a brilliant theoritical physicist of our time. The website is a collection of resources that he deems useful in the pursuit of becoming a good theoritical physicist.
Here's the website: http://www.staff.science.uu.nl/~gadda001/goodtheorist/
- The Physical Science Study Committee Films
The demonstrations are very neat and insightful. Highly recommended. https://www.youtube.com/watch?v=_YW0wjYdUPw&list=PL_hX5wLdhf_KuXqv0QzMoNQYgR_nBxETx
- The messenger lectures on Physics by Feynman
In these lectures Richard Feynman "offers an overview of selected physical laws and gathers their common features into one broad principle of invariance." Loaded with entertainment and feynman-ness.