Google Biophysics (A directory of sites ranked by popularity)

Professional Organizations

• The Biophysical Society
• Division of Biological Physics (DBP)of the American Physical Society (APS)
• The British Biophysical Society

• Online Textbook of the Biophysical Society -- a good general reference on many topics:
  • Techniques in biological physics
  • Molecular structures
  • Biophysical mechanisms
• The Virtual Journal of Biological Physics
• List of textbooks in biological physics
• Classic Papers in Biological Physics
• A listing of classic papers in biological physics
• Online biochemistry textbook by Henry Jakubowski

• Listing by The Biophysical Society:
• Listing by the DBP of the APS (see the DBP Homepage)

• Kleiber's Law web page: "How to run faster, live longer and anaesthetise an elephant"
• The Froude number and walking gait. This answers the old question, "Why didn't NASA bring any horses to the moon?"
• Other amusing scaling laws: Benford's Law and Zipf's Law
• Life at Low Reynolds Number, E. Purcell's famous discussion of bacterial locomotion

• National High Magnetic Field Laboratory (NHMFL)
• Magnetic Levitation Movies
• Magnetic Levitation of Plants
• NASA (and other low gravity sites)
• The Microgravity Science Division at NASA Lewis Research Center
• Microgravity Research Division (MRD)
• KC-135 ("The Vomit Comet")
• The American Society of Gravitational and Space Biology
(if you are interested in biophysics under low gravity conditions)
• NASA Specialized Center of Research and Training (NSCORT), at NC State University (a growing collection of gravitational and space biology issues, including courses)

• Center for Theoretical Biological Physics (San Diego)
• Bauer Center for Genomics Research (Harvard)
• Advanced Photon Source (Argonne)
• Pacific Northwest National Laboratory
• Protein Structure Factory (Germany)
• Diamond Synchrotron Light Source (UK)

• The ExPASy Molecular Biology Server
• The Swiss-PROT and TrEMBL protein sequence and structure databases
  
• The Protein Data Bank (also known as the Research Collaboratory for Structural Bioinformatics)
• Cell & Molecular Biology Online
• National Center for Biotechnology Information
• IMB Jena Image Library of Biological Macromolecules
• Create animated GIF images
from PDB protein structure files!!

• Online Textbook of Mammalian Vision (University of Utah)
• Chromatin Structure & Function Page 
• Introduction to Protein Folding
• Tutorial on peptide and protein structure
• Virtual Tour of the Nucleosome
  
• Biophysics of Macromolecules by the group at dkfz-Heidelberg
  
• L.Stryer's Biochemistry textbook homepage

Human Genome Project  -- three complementary views of the human genome

• U. Calif. at Santa Cruz
• National Center for Biotechnology Information (NCBI) and click "Map Viewer"
• European Bioinformatics Institute (EBI)

• Phil Nelson's Biological Physics / Phys 280/580 at Univ. Penn.
• Howard Berg's Introduction to Biophysics at Harvard Univ.
• (unavailable) Austin & Chan -- Princeton Biophysics Class Notes
• (unavailable) Rokhsar & Bustamante -- Berkeley Biophysics
• Biophysics 254 at University of Illinois, The Physical Basis of Life

Amazing biological drawings and animation

• David Goodsell's home page
• What does a cell interior look like?
• A big collection of biology web movies (Davidson College)
• Genetics movies (Portland State Univ)
• The F1-ATPase molecular motor from Northwestern University
• Background and further links to F0F1-ATPsynthase movies
• Various molecular motor movies from R.Vale lab

Medical Physics (or Radiation Physics)

• The Visible Human Project at the National Library of Medicine.
• Electronic Medical Physics World (EMPW)
• International Atomic Energy Agency

Optical Techniques & Fluorescence

• NHMFL primer on optical microscopy
• The Green Fluorescent Protein Bunny

NMR (nuclear magnetic resonance)

• UF Webpage of NMR Resources (lists and hotlinks, more than you could ever use)
• UF WWW NMR Spectrometer (take data, do analysis, and stay at home!  Cool!)
• Organic Chemistry On-Line:  Basic Proton and C-13 NMR (an on-line course "textbook")
• NMR Spectroscopy. Principles and Application
(Six second year lectures given at Imperial College by Henry Rzepa, another on-line "textbook")

Computational Biophysics

• Theoretical Biophysics Group at the University of Illinois at Urbana-Champaign (some nice movies and pictures of the structure and function of some macromolecules)
• Keck Computational Biology at Rice University

X-Ray Crystallagraphy and Related Sites

• Tutorial in Protein Crystallography (Cambridge Univ.)
• Crystallography 101 
• X-Ray Crystallography Resources Webpage

Some more entertaining physics sites

• Perpetual Motion and other bogus machines
• Introductory physics for designers of perpetual motion machines
• Random name generator. This is useful if you need to generate some human names so that you can submit a joke abstract for a meeting. See below.
• Joke abstract generator. This website will generate an entire abstract and research paper suitable for presentation at certain scientific meetings.