International Numerical Relativity Group -  .

APS Topical Interest Group on Gravitation - - Includes a brief description of the group as well as its newsletters.

Australasian Society for General Relativity and Gravitation - - Includes a newsletter, information on events, and links to related research groups.

Cambridge Relativity Group - - Includes links to relevant conference announcements, brief descriptions of research areas, staff list and a publications index.

Center of Applied Space Technology and Microgravity - - Gravitation and relativity theory within the German Physical Society.

Cosmology at the University of Kentucky - - The group is primarily interested in the numerical simulation of large-scale structure formation and the development of robust statistical measures for describing the resulting distributio.

LIGO Home Page - - The Laser Interferometer Gravitational-Wave Observatory (LIGO) project is a pioneering effort to design and construct a novel scientific facility - a gravitational-wave observatory - that will open a new observational window on the universe.

Max-Planck-Institut für Gravitationsphysik - - The Albert-Einstein-Institut (AEI), in Potsdam, is an institute of the Max-Planck-Gesellschaft, and carries out research in gravitational physics.

Pennsylvania State University: Institute of Gravity - - Includes lists of staff, publications lists, visitor information and event announcements, as well as brief descriptions of the research undertaken.

Pittsburgh Relativity Group - - Includes links to relevant conferences and magazine articles, a list of staff and online copies of paper preprints and theses.

Queen Mary - QMW Hyperspace GR - - A set of hypertext based services for general relativity research provided by the QMW Relativity grou.

Stanford U. - Gravity Probe B - - Gravity Probe B is the relativity gyroscope experiment being developed by NASA and Stanford University to test two extraordinary, unverified predictions of Albert Einstein's general theory of relativity.

Syracuse Relativity Group - - Includes staff information, descriptions of research being undertaken, information on colloquia and brief descriptions of relevant courses.