21. Library of the Physics Institutes of Bonn University. , l) C1 j7 _# q' ~+ i
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Library of the Physics Institutes of Bonn University. (German) 3 B' k$ O+ v: h, u& H* P) h

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22. Light and Matter Physics Area * U3 x! a5 Q  V5 T% A; H/ H8 T6 ?
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4 Q1 G! ?" E5 p$ J8 q9 s' ~A collection of 6 free e-Books surveying all areas of physics. ' ]0 l5 w) }( O3 ]/ \
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Click here

23. Motion Mountain 2 t* @' I! o$ A

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( Y+ w* n, i% C3 v8 e1 qA free e-Book surveying all areas of physics. A whopping 1132 pages!  6 y' o* k0 X( l+ N4 P# }  a
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24. Online Science and Math Textbooks (quite a lot)( b8 _. |3 K7 s9 c# l0 `
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5 ]/ S! k( t- }. Z/ X; K, TFrom Prof. Mark Dubin of the University of Colorado. + [0 h. L* r1 M- f# {
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" ?" K# h0 J9 Z# GClick here

25. Particles, Special Relativity, and Quantum Mechanics 5 Z8 P- {& x+ v- _7 U" i' q
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- x9 x1 r0 F6 nA basic introduction.  3 v" g0 U4 K! u: v6 q. n& X
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26. Phisics Colloquium ; W! V" s" s9 N5 f+ M
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2 r- A  Y5 ~% H& q% S5 {8 fFrom the Racah Physics Institute of the Hebrew University of Jerusalem. (some in Hebrew, some in English)  
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27. Fields and Particles Bookmarks ( Z8 z+ p& ^& C5 ^% R  t
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I don't know who collected all these links, but I'm very thankful for it!  
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28. Commisariat a L'Energie Atomique
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Scripts on theoretical physics. This link is to the English version of this French website. 2 r" J; F; d4 V

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29. Advanced Quantum Field Theory
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From Prof. Roberto Casalbuoni of Florence University. # d% c# k# c8 U" ~) a6 m

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30. Advanced Quantum Mechanics
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From Caltech. Notes on a course in advanced quantum mechanics.  , V( P5 W& j3 f! e0 ?/ z; A8 G

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30. Advanced Quantum Mechanics ) H- G- X+ N0 A4 \
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8 Q$ P; s7 R) F2 \" VFrom Caltech. Notes on a course in advanced quantum mechanics.  . n3 A4 H* |; L* ^! p! x
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' c! `# i! n  B/ N6 n3 r+ Z; xClick here

31. An Introduction to Quantum Computing
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From Caltech.  5 |( ~) }  U/ t
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30. Advanced Quantum Mechanics " x. Y6 P2 ]8 R# V6 e1 }9 `- |

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3 R0 E' |5 A# O- o; p& e6 _0 iFrom Caltech. Notes on a course in advanced quantum mechanics.  9 K* K6 Y* e) I$ C# s) D* f
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& ^7 V2 g" L9 S# hClick here

32. Fields
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& ]0 n: i3 C1 r% s; e+ a# MMonster QFT textbook by Prof. Warren Siegel of the C. N. Yang Institute for Theoretical Physics, SUNY Stonybrook. * s/ m. o; F" G9 O- z% @" q4 k
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33. Introduction to Topological Field Theory
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/ R/ g0 e! t6 e+ R3 y  g9 ~  q% gFrom Prof. R. J. Lawrence of the University of Michigan. / T! P8 [" @% `6 `! }9 T! {4 w

7 K4 D# i0 c, |  aClick here

34. Optical Physics and Quantum Electronics
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- H# L. U( _8 s5 a- lLecture notes from Harvard University.
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+ Z& j* z; R% ?, t& ^: nClick here

35. Quantum Computing Lecture Notes 9 k/ b/ P6 w6 f7 T( m0 p0 q; r' _
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From Caltech. * k! Y1 U0 x; r( s/ U) x2 \3 g
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36. Qubit ( k$ `$ E$ j6 \

$ k4 r% F' s) d9 p1 ZCentre for Quantum Computation, a collaboration of Oxford and Cambridge theorists. " B/ w3 H- H& @8 n* p
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37. QUIC ( |0 \8 a6 q. A: x0 p7 C- J
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Caltech's Quantum Information and Computation Group.   Z4 a, o2 j& y' p/ t
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38. Relativistic Quantum Field Theory & p  H/ O+ y0 g; r) k+ q- _
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From Prof. Dr. Wolfgang Lücke of the Institut für Physik und Physikalische Technologien.  
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Click here