Scholarpedia is a peer-reviewed online encyclopedia with physics articles and academic references.
A collection of informal explanations and demonstrations of classical physics phenomena and electrical engineering.
Freely available introductory and advanced physics textbooks covering mechanics, waves, electromagnetism, and modern physics.
Physics Hypertextbook; online reference covering classical mechanics, electricity, optics and modern physics.
OpenStax CNX hosts peer-reviewed open textbooks in physics, mathematics, and other sciences that can be read and adapted freely.
Interactive visual explanations of physics concepts through play-based learning.
Personal website by physicist John Walker with educational essays, calculators, and explorations of physics phenomena.
Online reference covering numerical methods, special functions, and mathematical physics.
Personal interactive visualizations and explainers for physics and mathematics concepts.
Wolfram's NKS explores cellular automata, complexity, and computational processes in physical systems.
Fizalis is a Russian physics education website offering theory, worked examples, and problems across classical and modern physics.
Collection of interactive visual demonstrations and problems in mathematics and mathematical physics.
Russian educational encyclopedia covering many subjects including physics.
Host of searchable physics textbook PDFs for secondary and first-year study.