MIT OpenCourseWare provides free access to course materials from MIT classes across physics and mathematics.
Caltech provides publicly accessible lecture notes and course materials from university-level physics instruction.
Harvard University hosts open course materials including David Morin's classical mechanics textbook.
Coursera offers recorded university lectures and courses but not problem books or detailed solution sets.
Leonard Susskind's online lecture course covering fundamental physics from classical mechanics to quantum field theory.
Platform offering free online courses including introductory and intermediate physics from universities.
American Association of Physics Teachers repository of experiments, demonstrations, and lesson materials.
Wolfram's cloud platform for mathematical and physical computations.
University course or institutional resource (Griffiths Electrodynamics covered).