- MIT - Open Course Ware Physics
- Gerard 't Hooft - "How to become a GOOD Theoretical Physicist"
- textbookrevolution.org -List of all Physics pages
- freescience.info (ebooklist has strong international flavor)
- DC Physics - Online Physics Textbooks

- The Basics of MRI (web-book)

by: Joseph P. Hornak

very well done and the prototype for what web-books should be - The BaBar Physics Book [SLAC-R-504] (pdf, ps)

by: The BaBar Collaboration

a great intro to CP Violation, every HEP exp needs to have a "Physics Book" like this - Advanced Mathematical Methods for Scientists and Engineers (pdf)

by: Sean Mauch

aka "Sean's Notes," simply legendary at Caltech for students taking AMa 95 - Hyperphysics (web-book)

by: C. Rod Nave

another fantastic web-book example - Handbook of Mathematical Functions (web-book w/ scanned jpeg images)

by: Milton Abramowitz & Irene A. Stegun

a great reference now with electronic indexing! - Numerical Recipes: The Art of Scientific Computing, 3rd Ed. (pdf) google

by: W.H. Press, S.A. Teukolsky, W.T. Vetterling, & B.P. Flannery

sample chapters available for free, full text free for developing countries - Engineering Statistics Handbook (web-book)

by: NIST/SEMATECH

a fantastic and pratical web reference for statistical methods - Mathematical Tools for Physics (pdf)

by: James Nearing

site includes animations - Quantum Field Theory (pdf) amazon google

by: Mark Srednicki

"prepublication draft...contains a number of errors (mostly minor)" - Lectures on Atomic Physics (pdf) amazon google

by: Walter R. Johnson

prepublication draft? - Lectures on Advanced Quantum Mechanics, 2nd Ed. (pdf, ps) amazon google

by: Freeman Dyson (LaTeX-ed by David Derbes)

legendary and classic notes that were the de-facto text on QED for several years - Fields (pdf, ps)

by: W. Siegel

"first free comprehensive textbook on quantum (and classical) field theory" - Order of Magnitude Physics (pdf)

by: Peter Goldreich, Sanjoy Mahajan, & Sterl Phinney

unofficial book for the popular OOM class at Caltech, partly the PhD thesis of SM - A Radically Modern Approach to Introductory Physics, Vols. 1 & 2 (pdf)

by: David J. Raymond

a brilliant idea for freshman physics course: "attempt to develop*all*of physics in a modern context" - Motion Mountain (pdf)

by: Christoph Schiller

an incredible 1500 page(!) introduction to physics - Essential Physics I (pdf)

Introduction to Groups, Invariants & Particles (pdf)

Age of Einstein (pdf)

by: Frank W.K. Firk

except AoE, written in the formal style of mathematical texts - Electromagnetic Field Theory (pdf, ps, dvi)

by: Bo ThidÃ©

website also includes problem book, "a textbook on the theory of electrodynamics, at roughly the same level as the well-known textbooks by Jackson and Panofsky & Phillips" - Lecture Notes on General Relativity (pdf) amazon google

by: Sean M. Carroll

notes that eventually became the book "Spacetime and Geometry"