Physics

Good Databases for This Subject

Astrophysics Data System Abstract Service
An index with abstracts from articles and books in the disciplines of astronomy, physics and science education.

ScienceDirect 
Covers all aspects of the sciences.

MathSciNet
Mathematical Reviews online

Highwire Science Journals
Science journals published by Stanford University's Highwire Press

Directory of Open Access Journals (DOAJ)
Free access to full text scientific and scholarly journals

Annual Reviews  1996-
Analytic reviews in the Biomedical, Physical, and Social Sciences.