Journals

Classical and Quantum Gravity
A journal for physicists, mathematicians and cosmologists working in the fields of gravitation and the theory of spacetime (via IOP Publishing: Electronic Journals).
http://www.iop.org/EJ/journal/CQG

General Relativity and Gravitation
Journal published by Springer, devoted to articles on general relativity and its applications.
http://www.springerlink.com/content/101151/

General Relativity and Quantum Cosmology E-Print Archive
E-Print Archive "gr-qc" in which many articles about general relativity and related topics are published (in advance of publication in conventional journals). Based at Cornell University.
http://arxiv.org/archive/gr-qc/

Matters of gravity (1991-2006)
Newsletter of the American Physical Society's Topical Group on Gravity, published two times a year, which gives a highly informative overview of recent developments in gravity and general relativity research. Site contains links to the editions Fall 1991 to Spring 2006.
http://www.phys.lsu.edu/mog/

Matters of Gravity (2006-present)
Newsletter of the American Physical Society's Topical Group on Gravity, published two times a year, which gives a highly informative overview of recent developments in gravity and general relativity research. Site contains links to the editions Fall 2006 and later.
http://www.oakland.edu/physics/Gravity.htm