Albert Einstein Online: Nearly everything related to Einstein on the web

arXiv: Open e-print archive with over 100,000 articles in physics, 10,000 in mathematics, and 1,000 in computer science. (Formerly called xxx.

Coilgun Systems: Provides research, experimentation and detailed graphical examples on the various stages of developing a coilgun. Links to other relevant websites

Condensed Matter E-print Server: arXiv.org e-print server. Free preprints of journal papers from 1992 onwards

Cosmic Ray, Neutrino and Other Experiments: Organized collection of links; includes space, balloon, air shower, and underground experiments

Directory of Plasma Conferences: A list of plasma science conferences

Electrodynamics Textbook: An electrodynamics Internet textbook project presenting a new, modern, on-line textbook on advanced electrodynamics, free to download and to contribute to

HEP Institutions on the Web: Index by country; from SPIRES. It gives the full address and phone/fax/url of the institution in addition to links to papers in HEP and people in HEPNAMES

Lecture Notes on General Relativity: Lecture notes for a one-semester course in General Relativity. By Sean Carroll Ph.

Light and Matter: Free introductory physics textbooks for the high school or college level, available as large pdf files to download. Topics available are Newtonian physics, conservation laws, vibrations and waves, electricity and magnetism, optics and modern physics

Living Reviews in Relativity: A peer-refereed, solely online physics journal publishing invited reviews covering all areas of relativity research. Published by the Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Potsdam, Germany

National Ignition Facility (Lawrence Livermore National Laboratory): The latest in a series of high-power laser facilities used for research in inertial confinement fusion

New Energy Times: Offers original reporting on research in the field of leading-edge energy and power technologies, with an emphasis on cold fusion

New Semiconductor Materials - Characteristics and Properties: This electronic archive from the Ioffe Institute contains frequently needed information for the most important semiconductor materials. The archive includes physical properties of semiconductors and heterostructures such as band, optical, electrical, mechanical, thermal and other properties

NIST Physical Reference Data: Research database from NIST, US

North Carolina State University Physics Demonstrations Collection: Extensive set of physics demonstrations, many with movies

Numerical Recipes: Complete free online versions of this standard textbook on computational methods, in the C, Fortran and Fortran-90 editions. PS/PDF. Software and C++ edition for sale

Particle Data Group: An international collaboration that reviews particle physics and related areas of astrophysics, and compiles/analyzes data on particle properties

Perspectives on Plasmas: Educational coverage of plasma science and technology with site links worldwide

Physics Finder: Compilation of physics authors that have published in American Institute of Physics journals

SINCRIS: Database of software for crystallography

The Basics of MRI: An online book outlining all of the physics and technology involved in magnetic resonance imaging

WIS List of Databases for Atomic and Plasma Physics: From: Plasma Laboratory of Weizmann Institute of Science, Israe

World Science U: Video clips and lectures about cosmology, particle physics, relativity and quantum mechanics presented by string theorist, Brian Greene. Requires free registration