Cause Effect
Dedicated to more sensible and satisfying concepts in physics and going beyond math to cause and effect.
http://www.causeeffect.org/
Eric Weisstein's World of Physics
Articles, definitions and equations dealing with astrophysics, electromagnetism, experimental physics, fluid mechanics, modern physics, optics, states of matter, thermodynamics, and wave motion.
http://scienceworld.wolfram.com/physics/
Laws List
Laws, rules, principles, effects, paradoxes, limits, constants, experiments, and thought experiments in physics.
http://www.alcyone.com/max/physics/laws/