Eric Weisstein's Treasure Trove of Physics  scienceworld.wolfram.com/physics Online encyclopedia of physics terms and formulas. Full searchable, and also browsable alphabetically and by topic. Part of Eric's Treasure Troves of Science.

The Net Advance of Physics  web.mit.edu/redingtn/www/netadv/welcome.html MIT resource providing discussions at various levels of sophistication that cover all areas of physics.

Physics 2000  www.colorado.edu/physics/2000 Provides an interactive opportunity to learn visually and conceptually about 20th Century science and high-tech devices.

Physics and Astronomy Classification Scheme (PACS)  publish.aps.org/PACS Hierarchical numbering scheme, developed by the American Institute of Physics, used to identify fields and sub-fields of physics.

Physics Central  www.physlib.com A page on modern physics, such as quantum mechanics and black holes, and some mathematics.

Physics News Graphics  aip.org/mgr/png Diagrams (with captions) appearing in various AIP publications, sorted by category or by date.

Physics on MathPages  www.mathpages.com/home/iphysics.htm Articles, leaning towards a mathematical description, on a wide range of topics in physics.

Physics Post  www.physicspost.com A tutorial and article driven community. Votes, science news and a discussion forum.

Physics Today  www.physicstoday.org The flagship publication of the American Institute of Physics (AIP). Provides feature articles, news stories, analyses, book and product reviews, a searchable job database, and obituaries.

Physics.org  www.physics.org Searchable database of physics resources from the Institute of Physics which matches a person's question, age and knowledge profile to handpicked sites. Also includes the Physics Life animation.

PhysLINK  www.physlink.com Links to physics departments, physical societies, journals, job information, and other physics related information.

Physnet: The Physics Departments and Documents Network  physnet.physik.uni-oldenburg.de/PhysNet Serves information from physics departments and institutes worldwide: departmental information, locally stored documents, authoring tools, free access journals, jobs, conferences and education material.

TheTangentBundle Physics Project  www.physics.thetangentbundle.net/wiki An experimental wiki-based collection of user-contributed articles on graduate level physics topics including subjects such as string theory, quantum field theory, mathematical physics and quantum mechanics.

What You Want To Know About Physics  kr.cs.ait.ac.th/~radok/physics Summarizes in simple language, without advanced mathematics, the foundations of physics. The index gives direct access to selected topics.

World Year of Physics 2005  www.wyp2005.org International effort to celebrate the 100th anniversary of the Miraculous Year (1905) and raise public awareness of physics.

Scientific American - Questions That Plague Physics  genesis1.phys.cwru.edu/~krauss/0804082.pdf A conversation with Lawrence M. Krauss, chair of the physics department at Case Western Reserve University. [PDF] (August, 2004)

Physics Today  www.physicstoday.org/feed.xml News, feature articles, reviews, obituaries, and other items from the monthly magazine for the physics community. [RSS]