Biography and History
  Contributions of Twentieth Century Women to Physics
  Marie Curie (American Institute of Physics)
  Lise Meitner (Bulletin of the Atomic Scientists)

Biophysics
  Biophysics Textbook Online --- see WWW section below)
  Macromolecular Simulation (Introduction)

Books and Journals
  Advanced Materials
  American Institute of Physics (Journals links)
  Annual Reviews - Physical Sciences
  Applied Optics (Optical Technology and Biomedical Optics)
  Applied Physics A: Materials Science & Processing
  Applied Physics Letters
  Biochimica et Biophysica Acta
  Bioelectromagnetics
  Biomaterials --- ScienceDirect
  Biophysical Chemistry --- ScienceDirect
  Biophysical Journal
  Chemical Physics --- ScienceDirect
  Chemical Physics Letters --- ScienceDirect
  ChemPhysChem
  Electromagnetic Field Theory (Classical EM - PDF Textbook)
  Europhysics Letters
  Highwire Press - Library of the Sciences and Medicine
  Institute of Physics Journals
  Journal of Applied Physics
  Journal of Chemical Physics
  Journal of Luminescence --- ScienceDirect
  Journal of the Optical Society of America A
    (Optics, Image Science, and Vision)
  Journal of the Optical Society of America B (Optical Physics)
  Journal of Physics D: Applied Physics
  Journal of Vacuum Science and Technology A
  Journal of Vacuum Science and Technology B
  Langmuir
  Measurement Science and Technology
  Nano Letters
  Nanotechnology
  Nature
  Optics Letters
  Physical Biology
  Physical Chemistry Chemical Physics
  Physical Review Online
  Physics in Medicine and Biology
  Physics Letters --- ScienceDirect
  Proceedings of the National Academy of Science USA (PNAS)
  Quarterly Reviews of Biophysics
  Review of Scientific Instruments
  Science
  Sensors and Actuators A: Physical Sensors --- ScienceDirect
  Sensors and Actuators B: Chemical Sensors --- ScienceDirect
  Small

Cosmology and Relativity
  Relativity on the Web

Materials and Methods
  Constants, SI Units, Measurement Uncertainty (NIST)
  Fisher Scientific
  Integrator (Wolfram Research)
  LaVision BioTec GmbH (multifocal, laser scanning microscopy)
  MAGIC (electromagnetic particle-in-cell simulator)
  Signal Processing; Fourier, Hilbert Transform - GREAT TUTORIALS!
  Units of Measurement (University of North Carolina)
  VWR Scientific Products International

Molecular Dynamics
  Biocomputing - University of Calgary - Peter Tieleman
  GROMACS

Organizations
  American Association for the Advancement of Science
  American Institute of Physics
  American Physical Society
  Bioelectromagnetics Society
  Biophysical Society
  Materials Research Society

Quantum Mechanics
  Nonlocality and other things quantum mechanical (H is for h_bar)
  Quantum Chemistry Notes - Sherrill Group -
    Georgia Institute of Technology
  Quantum Physics 130A - UCSD
  Quantum Physics 130B - UCSD
  Quantum Physics Online - Ecole Polytechnique

WWW
  Biophysical Society Resources (Biophysics Textbook Online)
  ChemSpy - Chemistry Internet Navigator
  Fluorescence in Protein Research (PPS '99)
  Handbook of Biological Physics (Elsevier)
  HyperPhysics (Nave - Georgia State University
  Mathematics Pages
  MathWorld - Eric Weisstein's World of Mathematics
  PlanetMath
  Stanford Linear Accelerator Center Virtual Visitor Center
  WWW Virtual Library of Chemistry