Test facilities for future linear colliders

For many years now there has been active research around the world towards a future linear collider with an energy of about 1 TeV. This research has led to several test facilities around the world that seek to test key aspects of the various approaches. The purpose of this paper is to review the status of the test facilities. The test facilities focus on three primary areas in the linear collider: creating the low emittance beams in the injector and damping rings, accelerating the beams in the high energy linac, and focusing the beams to a small spot in the final focus. The damping ring and injection is the primary focus of the Accelerator Test Facility (ATF) at KEK. The accelerator technology is the primary focus of the Tesla Test Facility Linac, the S-Band Test Facility, the NLC Test Accelerator and the CLIC Test Facility. Lastly, the Final Focus Test Beam (FFTB) addresses the problems in the final focus system. We will discuss all the test facilities above except the FFTB.