Australian Consortium for Interferometric Gravitational Astronomy http://www.anu.edu.au/Physics/ACIGA/
ACIGA is intended to undertake research and development aimed at improving the performance of present laser interferometer gravitational wave detectors through advanced designs to ultimate limits set by mechanics, quantum mechanics, lasers and optics; and to transfer this into practical designs that can be used in production of commercial products.
GEO 600 http://www.geo600.uni-hannover.de/
A UK-German project aiming at the direct detection of gravitational waves by means of a laser interferometer of 600 m armlength.
Laser Interferometer Space Antenna (LISA) http://www.esa.int/science/lisa
An ESA space mission to detect and observe gravitational waves from massive black holes and galactic binary stars in the frequency range 10-4 to 10-1 hz. Useful measurements in this frequency range cannot be made on the ground because of the unshieldable background of local gravitational noise.
TAMA http://tamago.mtk.nao.ac.jp/
A five-year (1995-2000) project involving almost all gravity physics researchers in Japan. It adopts a Fabry-Perot Michelson Interferometer (FPMI) with recycling. The aim of this project is to develop advanced techniques needed for a future km-sized interferometer and catch gravitational waves that may occur by chance within our local group of galaxies.
The Virgo Project http://www.virgo.infn.it/
Collaboration between Italian and French research teams for the realization of an interferometric gravitational wave detector.