PLATO (for Planetary Transits and Oscillations of Stars) is an European Space Agency spacecraft in planning aimed at finding Extra-Solar Planets. It is aimed at relatively bright stars (Magnitudes 4-11), that will support informative follow-up studies. It will identify Extrasolar Planets by spotting Transits and Radial Velocity variations, and Transit Timing Variations. Plans are to launch in 2026.
A 2014 update to the plan was called PLATO 2.0, which specifically aims at terrestrial planets around Sun-like stars in the Habitable Zone.