PhysicsWeb - collection of online resources for the physics community.
LANL archive - preprint archive in Los Alamos.
Physics Today - journal published monthly by the American Institute of Physics.
Unit converter - conversion of units.
Crystal lattice structures - an index of common lattice structures.
Physical constants - a list of fundamental physical constants
ChemSpider - Database of Chemical Structures and Property Predictions
NIST Chemistry WebBook The NIST Chemistry WebBook
Grand orbital table - visualized atomic orbitals.
Orbitron (atomic orbitals and molecular orbitals)
Universe - astronomy picture of the day from NASA.
Shell programming - shell programming basics.
Linus Pauling and The Nature of the Chemical Bond: A Documentary History - Special Collections - Oregon State University
Energy-Consistent Pseudopotentials of the Stuttgart/Cologne Group
Bilbao Crystallographic Server Brillouin zone from Bilbao server