Australasian Society for General Relativity and GravitationCambridge Relativity GroupMax-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.

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.

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

U. British Columbia - UBC Hyperspace GRSyracuse Relativity GroupPenn State U - Center for Gravitational Physics and GeometryPittsburgh Relativity GroupU. Alberta Cosmology ProgramUT Austin - Center for RelativityStanford 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.

Topical Interest Group on Gravitation - American Physical Society.

U. Cape Town, South AfricaCosmology 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 distribution

Oxford Mathematical Physics Group