arXiv Open Access Articles
arXiv, an open-access e-print service for the sciences, offers more than 100,000 articles in physics. Owned by Cornell University, arXiv is partially funded by the National Science Foundation.
Directory of Open Access Journals
DOAJ is a fast-growing collection of "free, full-text, quality-controlled scientific and scholarly journals" in a broad range of subjects and languages. See the Institute of Physics' New Journal of Physics which has one of the highest impact factors in physics.
Contains information on physics subjects, products, instruments & software, and news & events.
Discoveries and innovations in physics that began with support from The National Science Foundation (NSF)